High Pressure Boilers

Front 1

A low pressure steam boiler has an MAWP of _____ psi

Back 1

15

Front 2

The higher the steam pressure, the higher the ____ of the water in the boiler.

Back 2

Boiling point

Front 3

____ is the amount of energy equal to the evaporation of 34.5 lb of water/hr from and at a feedwater temperature of 212 F

Back 3

Boiler horsepower

Front 4

When a steam boiler is operating at 100 pounds per square inch gauge pressure (psig), the temperature of the water and steam will be approximately _____ F

Back 4

338

Front 5

A horizontal return tubular (HRT) boiler is _____ boiler.

Back 5

Firetube

Front 6

As steam pressure in a boiler increases, there is a corresponding increase in the ___ .

Back 6

Temperature

Front 7

A sudden drop in pressure from 100 psig to 0 psig without a corresponding drop in temperature could result in a(n) ___.

Back 7

Exposion

Front 8

Water will boil and turn to steam when it reaches ____ F at atmospheric pressure at sea level.

Back 8

212

Front 9

___ efficiency is the ratio of the heat absorbed by the boiler (output) to the heat available in the fuel (input)

Back 9

Overall plant

Front 10

Baffles are used to direct gases so that they come in close contact with the ___ .

Back 10

Boiler heating surface

Front 11

___ stress is stress that occurs when two forces of equal intensity act parallel to each other but in opposite directions

Back 11

Shear

Front 12

Some watertube boilers are equipped with ___ to increase the heating surface and the life of the furnace refractory

Back 12

Waterwalls

Front 13

Some watertube boilers are equipped with ___ to increase the heating surface and the life of the furnace refractory

Back 13

Waterwalls

Front 14

A disadvantage of a vertical firetube boiler is that it requires ___ .

Back 14

A high ceiling

Front 15

Some watertube boilers are equipped with ___ to increase the heating surface and the life of the furnace refractory

Back 15

Waterwalls

Front 16

A disadvantage of a vertical firetube boiler is that it requires ___ .

Back 16

A high ceiling

Front 17

In a firetube boiler, the heat produced by gases of combustion ___ .

Back 17

Passes through tubes

Front 18

Watertube boilers were designed to operate at pressures as high as ___ psi, a point known as the critical pressure of steam.

Back 18

3206

Front 19

A mud drum, if used, is the lowest part of the water side of a(n) ___ boiler.

Back 19

Watertube

Front 20

A ___ boiler is a watertube boiler in which replaceable serpentine tubes are connected to the upper and lower drums and surround the firebox.

Back 20

Flex-tube

Front 21

In electrode electric boilers, heat is generated by electric current flowing from one electrode to another electrode through the ___ .

Back 21

Boiler water

Front 22

A high pressure steam boiler operates at a steam pressure over ___ psi.

Back 22

15

Front 23

A condensing economizer recovers ___ Btu/lb from the heat in the water vapor.

Back 23

970

Front 24

Boiler tubes are manufactured using materials that meet ___ specifications.

Back 24

ASTM

Front 25

Boiler tubes are manufactured using materials that meet ___ specifications.

Back 25

ASTM

Front 26

In a watertube boiler, the heated water inside the tubes becomes ___ , causing it to raise.

Back 26

Less dense

Front 27

Boiler tubes are manufactured using materials that meet ___ specifications.

Back 27

ASTM

Front 28

In a watertube boiler, the heated water inside the tubes becomes ___ , causing it to raise.

Back 28

Less dense

Front 29

Cogeneration produces ___ for use in a process or heating.

Back 29

Electricity

Front 30

A ___ is a device that converts mechanical energy into electrical energy by means of electromagnetic induction.

Back 30

Generator

Front 31

___ is used to support and protect electrical conductors.

Back 31

Conduit

Front 32

If the boiler is generating 20 000 lb/hr of steam, it must be supplied with ___ lb/hr of feedwater.

Back 32

20 000

Front 33

From deaerator, oxygen and other noncondensable gases are separated from the feedwater and directed to the atmosphere ___ .

Back 33

Through the vent

Front 34

From deaerator, oxygen and other noncondensable gases are separated from the feedwater and directed to the atmosphere ___ .

Back 34

Through the vent

Front 35

A(n) ___ system is a system of measuring instruments and controllers that work together to control a process.

Back 35

Control

Front 36

One pound of water is needed to produce ___ of steam.

Back 36

1 lb

Front 37

One pound of water is needed to produce ___ of steam.

Back 37

1 lb

Front 38

In a low-pressure gas system, the ___ valve is an electric valve that cannot be opened until the gas pilot is lit.

Back 38

Manual reset

Front 39

One pound of water is needed to produce ___ of steam.

Back 39

1 lb

Front 40

In a low-pressure gas system, the ___ valve is an electric valve that cannot be opened until the gas pilot is lit.

Back 40

Manual reset

Front 41

___ are used for loads that require dry steam, such as turbines.

Back 41

Superheaters

Front 42

In a feedwater system, the ___ valve is located closest to the shell of the boiler on the feedwater line so that the check valve can be repaired without draining (dumping) the boiler.

Back 42

Stop

Front 43

A steaming boiler can have the water in the gauge glass go from half full to empty in a matter of ___ if water is not added to the boiler.

Back 43

Minutes

Front 44

In a fuel oil system, the purpose of duplex strainers is to ___ .

Back 44

Permit one strainer to be cleaned while the other is in service

Front 45

In a fuel oil system, the purpose of duplex strainers is to ___ .

Back 45

Permit one strainer to be cleaned while the other is in service

Front 46

Superheated steam has more ___ than saturated steam at the same pressure

Back 46

Heat energy

Front 47

In a fuel oil system, the purpose of duplex strainers is to ___ .

Back 47

Permit one strainer to be cleaned while the other is in service

Front 48

Superheated steam has more ___ than saturated steam at the same pressure

Back 48

Heat energy

Front 49

The deaerator is located ___ .

Back 49

Above the feedwater pumps

Front 50

In a fuel oil system, the purpose of duplex strainers is to ___ .

Back 50

Permit one strainer to be cleaned while the other is in service

Front 51

Superheated steam has more ___ than saturated steam at the same pressure

Back 51

Heat energy

Front 52

The deaerator is located ___ .

Back 52

Above the feedwater pumps

Front 53

A gas pilot line on a high-pressure gas system supplies gas through a ___ valve to the pilot gas pressure regulator.

Back 53

Shutoff

Front 54

In a fuel oil system, the purpose of duplex strainers is to ___ .

Back 54

Permit one strainer to be cleaned while the other is in service

Front 55

Superheated steam has more ___ than saturated steam at the same pressure

Back 55

Heat energy

Front 56

The deaerator is located ___ .

Back 56

Above the feedwater pumps

Front 57

A gas pilot line on a high-pressure gas system supplies gas through a ___ valve to the pilot gas pressure regulator.

Back 57

Shutoff

Front 58

The purpose of any fuel oil system is to supply fuel oil to the burner at the proper ___.

Back 58

Temperature and pressure

Front 59

No. ___ fuel oil needs to be heated before it is pumped so that it can flow.

Back 59

6

Front 60

No. ___ fuel oil needs to be heated before it is pumped so that it can flow.

Back 60

6

Front 61

Pulverized coal allows ___ .

Back 61

For closer contact between the coal and oxygen for complete combustion

Front 62

Draft is ___ caused by a difference in pressure between two points.

Back 62

The flow of air or gases of combustion

Front 63

Draft is ___ caused by a difference in pressure between two points.

Back 63

The flow of air or gases of combustion

Front 64

Natural draft is a result of temperature differences between ___ .

Back 64

Air and gases of combustion

Front 65

In a high-pressure gas system, the air mixes with the gas in the ___ .

Back 65

Burner register

Front 66

A measuring instrument can use a ___ to send a signal to a controller.

Back 66

Transmitter

Front 67

Pulverized coal is ground into a fine powder and blown into the combustion chamber where it is burned in ___ .

Back 67

Suspension

Front 68

A control system uses a ___ to execute a control strategy

Back 68

Control loop

Front 69

Water weighs approximately ___ lb/gal.

Back 69

8.3

Front 70

Induced draft is produced by pulling air through the boiler furnace with a fan located in the ___.

Back 70

Breeching

Front 71

Induced draft is produced by pulling air through the boiler furnace with a fan located in the ___.

Back 71

Breeching

Front 72

A control loop uses a ___ as the control element.

Back 72

Steam pressure controller

Front 73

Codes may require that a(n) ___ be positioned before the firing-rate valve that controls the volume of gas to the burner.

Back 73

Manual shutoff valve

Front 74

Boiler fittings are necessary for ___.

Back 74

Efficiency

Front 75

To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___.

Back 75

Safety valve

Front 76

To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___.

Back 76

Safety valve

Front 77

The purpose of a safety valve is to ___.

Back 77

Prevent the boiler from exceeding its MAWP

Front 78

To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___.

Back 78

Safety valve

Front 79

The purpose of a safety valve is to ___.

Back 79

Prevent the boiler from exceeding its MAWP

Front 80

Safety valves are designed to ___.

Back 80

Pop open

Front 81

To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___.

Back 81

Safety valve

Front 82

The purpose of a safety valve is to ___.

Back 82

Prevent the boiler from exceeding its MAWP

Front 83

Safety valves are designed to ___.

Back 83

Pop open

Front 84

When testing a safety valve manually, there must be ___.

Back 84

At least 75% of the safety valve popping pressure on the boiler

Front 85

To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___.

Back 85

Safety valve

Front 86

The purpose of a safety valve is to ___.

Back 86

Prevent the boiler from exceeding its MAWP

Front 87

Safety valves are designed to ___.

Back 87

Pop open

Front 88

When testing a safety valve manually, there must be ___.

Back 88

At least 75% of the safety valve popping pressure on the boiler

Front 89

Any repairs to the safety valve must be done by the ___.

Back 89

Manufacturer-authorized representative

Front 90

A(n) ___ test is used to test relief capacity of a safety valve

Back 90

Accumulation

Front 91

A(n) ___ test is used to test relief capacity of a safety valve

Back 91

Accumulation

Front 92

___ pressure is the pressure caused by the weight of a column of water.

Back 92

Hydrostatic

Front 93

A(n) ___ test is used to test relief capacity of a safety valve

Back 93

Accumulation

Front 94

___ pressure is the pressure caused by the weight of a column of water.

Back 94

Hydrostatic

Front 95

A cyclone separator is a cylindrical device that separates water droplets from steam using ___.

Back 95

Centrifugal force

Front 96

A(n) ___ test is used to test relief capacity of a safety valve

Back 96

Accumulation

Front 97

___ pressure is the pressure caused by the weight of a column of water.

Back 97

Hydrostatic

Front 98

A cyclone separator is a cylindrical device that separates water droplets from steam using ___.

Back 98

Centrifugal force

Front 99

A steam pressure gauge must be protected by a siphon to prevent ___.

Back 99

Steam from damaging the gauge

Front 100

A(n) ___ test is used to test relief capacity of a safety valve

Back 100

Accumulation

Front 101

___ pressure is the pressure caused by the weight of a column of water.

Back 101

Hydrostatic

Front 102

A cyclone separator is a cylindrical device that separates water droplets from steam using ___.

Back 102

Centrifugal force

Front 103

A steam pressure gauge must be protected by a siphon to prevent ___.

Back 103

Steam from damaging the gauge

Front 104

The correction factor for hydrostatic pressure is ___ psi per vertical foot.

Back 104

0.43

Front 105

The boiler vent is open when warming up a boiler until ___.

Back 105

There is 10-15 psi of steam pressure on the boiler

Front 106

Separators work on the basic principle of ___.

Back 106

Changing direction of the steam flow

Front 107

Separators work on the basic principle of ___.

Back 107

Changing direction of the steam flow

Front 108

The dry pipe separator is located in the ___.

Back 108

Upper part of the steam drum

Front 109

Separators work on the basic principle of ___.

Back 109

Changing direction of the steam flow

Front 110

The dry pipe separator is located in the ___.

Back 110

Upper part of the steam drum

Front 111

The ASME Code states that high pressure boilers in battery (two or more boilers connected to a common header) and equipped with manhole openings must have ___.

Back 111

Two main steam stop valves

Front 112

Separators work on the basic principle of ___.

Back 112

Changing direction of the steam flow

Front 113

The dry pipe separator is located in the ___.

Back 113

Upper part of the steam drum

Front 114

The ASME Code states that high pressure boilers in battery (two or more boilers connected to a common header) and equipped with manhole openings must have ___.

Back 114

Two main steam stop valves

Front 115

A main steam stop valve should be a(n) ___ valve.

Back 115

os&y gate

Front 116

Separators work on the basic principle of ___.

Back 116

Changing direction of the steam flow

Front 117

The dry pipe separator is located in the ___.

Back 117

Upper part of the steam drum

Front 118

The ASME Code states that high pressure boilers in battery (two or more boilers connected to a common header) and equipped with manhole openings must have ___.

Back 118

Two main steam stop valves

Front 119

A main steam stop valve should be a(n) ___ valve.

Back 119

os&y gate

Front 120

A main steam stop valve should be a gate valve because a gate valve ___.

Back 120

Offers no resistance to the flow of steam

Front 121

Separators work on the basic principle of ___.

Back 121

Changing direction of the steam flow

Front 122

The dry pipe separator is located in the ___.

Back 122

Upper part of the steam drum

Front 123

The ASME Code states that high pressure boilers in battery (two or more boilers connected to a common header) and equipped with manhole openings must have ___.

Back 123

Two main steam stop valves

Front 124

A main steam stop valve should be a(n) ___ valve.

Back 124

os&y gate

Front 125

A main steam stop valve should be a gate valve because a gate valve ___.

Back 125

Offers no resistance to the flow of steam

Front 126

During a boiler inspection, the main steam stop valves are ___.

Back 126

Closed, locked and tagged

Front 127

Separators work on the basic principle of ___.

Back 127

Changing direction of the steam flow

Front 128

The dry pipe separator is located in the ___.

Back 128

Upper part of the steam drum

Front 129

The ASME Code states that high pressure boilers in battery (two or more boilers connected to a common header) and equipped with manhole openings must have ___.

Back 129

Two main steam stop valves

Front 130

A main steam stop valve should be a(n) ___ valve.

Back 130

os&y gate

Front 131

A main steam stop valve should be a gate valve because a gate valve ___.

Back 131

Offers no resistance to the flow of steam

Front 132

During a boiler inspection, the main steam stop valves are ___.

Back 132

Closed, locked and tagged

Front 133

When warming up a boiler, the ___ is in the open position until the boiler gauge registers about 10 to 15 psi.

Back 133

The boiler vent

Front 134

During normal usage, ___ are used to allow for the expansion and contraction of the main steam line

Back 134

Expansion bends

Front 135

During normal usage, ___ are used to allow for the expansion and contraction of the main steam line

Back 135

Expansion bends

Front 136

Boiler safety valves are placed at the highest part of the ___.

Back 136

Steam space

Front 137

During normal usage, ___ are used to allow for the expansion and contraction of the main steam line

Back 137

Expansion bends

Front 138

Boiler safety valves are placed at the highest part of the ___.

Back 138

Steam space

Front 139

A safety valve must be capable of discharging all the steam without the pressure increasing more than ___% above the maximum MAWP

Back 139

6

Front 140

During normal usage, ___ are used to allow for the expansion and contraction of the main steam line

Back 140

Expansion bends

Front 141

Boiler safety valves are placed at the highest part of the ___.

Back 141

Steam space

Front 142

A safety valve must be capable of discharging all the steam without the pressure increasing more than ___% above the maximum MAWP

Back 142

6

Front 143

A safety valve opens when the ___ exerted by the steam exceeds that of the spring

Back 143

Total force

Front 144

During normal usage, ___ are used to allow for the expansion and contraction of the main steam line

Back 144

Expansion bends

Front 145

Boiler safety valves are placed at the highest part of the ___.

Back 145

Steam space

Front 146

A safety valve must be capable of discharging all the steam without the pressure increasing more than ___% above the maximum MAWP

Back 146

6

Front 147

A safety valve opens when the ___ exerted by the steam exceeds that of the spring

Back 147

Total force

Front 148

___ fittings are used for water columns operating above 350 psi

Back 148

Steel

Front 149

During normal usage, ___ are used to allow for the expansion and contraction of the main steam line

Back 149

Expansion bends

Front 150

Boiler safety valves are placed at the highest part of the ___.

Back 150

Steam space

Front 151

A safety valve must be capable of discharging all the steam without the pressure increasing more than ___% above the maximum MAWP

Back 151

6

Front 152

A safety valve opens when the ___ exerted by the steam exceeds that of the spring

Back 152

Total force

Front 153

___ fittings are used for water columns operating above 350 psi

Back 153

Steel

Front 154

The ___ is the part on a safety valve that increases the area of the safety valve disc

Back 154

Huddling chamber

Front 155

A line desuperheater is used in conjunction with a ___.

Back 155

Pressure reducing station

Front 156

A line desuperheater is used in conjunction with a ___.

Back 156

Pressure reducing station

Front 157

Some plant are equipped with a ___ instead of a blowdown tank.

Back 157

Blowdown separator

Front 158

A line desuperheater is used in conjunction with a ___.

Back 158

Pressure reducing station

Front 159

Some plant are equipped with a ___ instead of a blowdown tank.

Back 159

Blowdown separator

Front 160

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 160

98%

Front 161

A line desuperheater is used in conjunction with a ___.

Back 161

Pressure reducing station

Front 162

Some plant are equipped with a ___ instead of a blowdown tank.

Back 162

Blowdown separator

Front 163

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 163

98%

Front 164

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 164

Proportioning valve

Front 165

A line desuperheater is used in conjunction with a ___.

Back 165

Pressure reducing station

Front 166

Some plant are equipped with a ___ instead of a blowdown tank.

Back 166

Blowdown separator

Front 167

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 167

98%

Front 168

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 168

Proportioning valve

Front 169

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 169

1

Front 170

A line desuperheater is used in conjunction with a ___.

Back 170

Pressure reducing station

Front 171

Some plant are equipped with a ___ instead of a blowdown tank.

Back 171

Blowdown separator

Front 172

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 172

98%

Front 173

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 173

Proportioning valve

Front 174

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 174

1

Front 175

A throttling calorimeter is used to directly measure the ___.

Back 175

Moisture content in steam

Front 176

A line desuperheater is used in conjunction with a ___.

Back 176

Pressure reducing station

Front 177

Some plant are equipped with a ___ instead of a blowdown tank.

Back 177

Blowdown separator

Front 178

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 178

98%

Front 179

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 179

Proportioning valve

Front 180

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 180

1

Front 181

A throttling calorimeter is used to directly measure the ___.

Back 181

Moisture content in steam

Front 182

The flow of steam maintained through a superheater should never be less than ___% of boiler capacity.

Back 182

25

Front 183

A line desuperheater is used in conjunction with a ___.

Back 183

Pressure reducing station

Front 184

Some plant are equipped with a ___ instead of a blowdown tank.

Back 184

Blowdown separator

Front 185

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 185

98%

Front 186

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 186

Proportioning valve

Front 187

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 187

1

Front 188

A throttling calorimeter is used to directly measure the ___.

Back 188

Moisture content in steam

Front 189

The flow of steam maintained through a superheater should never be less than ___% of boiler capacity.

Back 189

25

Front 190

When water is boiling, the water and steam above it are at ___.

Back 190

The same temperature and pressure

Front 191

A line desuperheater is used in conjunction with a ___.

Back 191

Pressure reducing station

Front 192

Some plant are equipped with a ___ instead of a blowdown tank.

Back 192

Blowdown separator

Front 193

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 193

98%

Front 194

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 194

Proportioning valve

Front 195

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 195

1

Front 196

A throttling calorimeter is used to directly measure the ___.

Back 196

Moisture content in steam

Front 197

The flow of steam maintained through a superheater should never be less than ___% of boiler capacity.

Back 197

25

Front 198

When water is boiling, the water and steam above it are at ___.

Back 198

The same temperature and pressure

Front 199

Water hammer is caused by ___ and can lead to a line rapture

Back 199

Mixing steam and water

Front 200

A line desuperheater is used in conjunction with a ___.

Back 200

Pressure reducing station

Front 201

Some plant are equipped with a ___ instead of a blowdown tank.

Back 201

Blowdown separator

Front 202

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 202

98%

Front 203

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 203

Proportioning valve

Front 204

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 204

1

Front 205

A throttling calorimeter is used to directly measure the ___.

Back 205

Moisture content in steam

Front 206

The flow of steam maintained through a superheater should never be less than ___% of boiler capacity.

Back 206

25

Front 207

When water is boiling, the water and steam above it are at ___.

Back 207

The same temperature and pressure

Front 208

Water hammer is caused by ___ and can lead to a line rapture

Back 208

Mixing steam and water

Front 209

A steam trap usually has a ___ installed on the inlet line

Back 209

Steam strainer

Front 210

A line desuperheater is used in conjunction with a ___.

Back 210

Pressure reducing station

Front 211

Steam turbines require ___ steam

Back 211

Dry superheated

Front 212

Some plant are equipped with a ___ instead of a blowdown tank.

Back 212

Blowdown separator

Front 213

If steam has a quality if ___%, it is 98% vapor and contains 2% water

Back 213

98%

Front 214

In a heat recovery system, the ___ regulates the flow of makeup water to the flash economizer

Back 214

Proportioning valve

Front 215

A 10 F rise in a feedwater temperature produces approximately ___% savings in fuel.

Back 215

1

Front 216

A throttling calorimeter is used to directly measure the ___.

Back 216

Moisture content in steam

Front 217

The flow of steam maintained through a superheater should never be less than ___% of boiler capacity.

Back 217

25

Front 218

When water is boiling, the water and steam above it are at ___.

Back 218

The same temperature and pressure

Front 219

Water hammer is caused by ___ and can lead to a line rapture

Back 219

Mixing steam and water

Front 220

A steam trap usually has a ___ installed on the inlet line

Back 220

Steam strainer

Front 221

The air ejectors on the condenser of a steam turbine are used to remove air and other noncondensable gases from the ___.

Back 221

Comdenser

Front 222

Boilers operating at ___ psi or more are required to have two blowdown valves mounted on the same blowdown line.

Back 222

100

Front 223

When ___ fills an inverted bucket steam trap, the bucket loses buoyancy and sinks to open the discharge valve

Back 223

Condensate

Front 224

Failure to maintain steam flow will result in ___ superheater tubes

Back 224

Overheating of

Front 225

Failure to maintain steam flow will result in ___ superheater tubes

Back 225

Overheating of

Front 226

Watertube boilers can be fitted with ___ to increase the heat content of the steam

Back 226

Superheaters

Front 227

Failure to maintain steam flow will result in ___ superheater tubes

Back 227

Overheating of

Front 228

Watertube boilers can be fitted with ___ to increase the heat content of the steam

Back 228

Superheaters

Front 229

The bellows of a thermostatic steam traps is usually filled with a(n) ___ and water solution to increase the sensitivity of the trap

Back 229

Alcohol

Front 230

Failure to maintain steam flow will result in ___ superheater tubes

Back 230

Overheating of

Front 231

Watertube boilers can be fitted with ___ to increase the heat content of the steam

Back 231

Superheaters

Front 232

The bellows of a thermostatic steam traps is usually filled with a(n) ___ and water solution to increase the sensitivity of the trap

Back 232

Alcohol

Front 233

Although the condensate tank is vented, it is possible to have a pressure buildup caused by ___.

Back 233

Leaking steam trap

Front 234

According to the ASME Code, if the MAWP exceeds ___ psi, the blowdown lines and the fittings must be composed of materials suitable for the temperature and pressures allowed

Back 234

125

Front 235

A steam trap can be tested with a(n) ___ to determine if it’s working properly

Back 235

Ultrasonic device

Front 236

In large steam boiler plants, a(n) ___ is necessary to provide the extra capacity required to handle changing loads and peak flow of condensate

Back 236

Surge tank

Front 237

In large steam boiler plants, a(n) ___ is necessary to provide the extra capacity required to handle changing loads and peak flow of condensate

Back 237

Surge tank

Front 238

A ___ steam trap is a steam trap that has a single movable disc that rises to allow the discharge of air and cool condensate

Back 238

Thermodynamic

Front 239

In large steam boiler plants, a(n) ___ is necessary to provide the extra capacity required to handle changing loads and peak flow of condensate

Back 239

Surge tank

Front 240

A ___ steam trap is a steam trap that has a single movable disc that rises to allow the discharge of air and cool condensate

Back 240

Thermodynamic

Front 241

Some ___ moisture separators automatically open and close because they use a wax that expends and contracts with temperature changes

Back 241

Variable orifice

Front 242

In large steam boiler plants, a(n) ___ is necessary to provide the extra capacity required to handle changing loads and peak flow of condensate

Back 242

Surge tank

Front 243

A ___ steam trap is a steam trap that has a single movable disc that rises to allow the discharge of air and cool condensate

Back 243

Thermodynamic

Front 244

Some ___ moisture separators automatically open and close because they use a wax that expends and contracts with temperature changes

Back 244

Variable orifice

Front 245

The raw makeup water system generally has a float chamber located at the ___ water level in a surge tank

Back 245

Minimum

Front 246

In large steam boiler plants, a(n) ___ is necessary to provide the extra capacity required to handle changing loads and peak flow of condensate

Back 246

Surge tank

Front 247

A ___ steam trap is a steam trap that has a single movable disc that rises to allow the discharge of air and cool condensate

Back 247

Thermodynamic

Front 248

Some ___ moisture separators automatically open and close because they use a wax that expends and contracts with temperature changes

Back 248

Variable orifice

Front 249

The raw makeup water system generally has a float chamber located at the ___ water level in a surge tank

Back 249

Minimum

Front 250

Transfer pumps are used to transfer the mixture of ___ from a surge tank to the deaerator or directly to the boiler feedwater pumps

Back 250

Condensate and raw makeup water

Front 251

A makeup control valve is used to ___.

Back 251

Maintain a constant water level in a feedwater heater

Front 252

The ___ is the water level designed as being the proper water level for safe boiler operation

Back 252

NOWL

Front 253

The purpose of a feedwater regulator is to ___.

Back 253

Maintain a constant water level in a boiler

Front 254

The purpose of a feedwater regulator is to ___.

Back 254

Maintain a constant water level in a boiler

Front 255

Feedwater regulators control the feedwater pump to maintain the water level ___.

Back 255

At the NOWL

Front 256

The purpose of a feedwater regulator is to ___.

Back 256

Maintain a constant water level in a boiler

Front 257

Feedwater regulators control the feedwater pump to maintain the water level ___.

Back 257

At the NOWL

Front 258

The sequence of three numbers found on the nameplate mounted on a reciprocating feedwater pump refers to the ___.

Back 258

Diameter of the steam piston, diameter of the water piston, and length of the pump stroke

Front 259

___ are usually used to create the draft needed to overcome the resistance caused by economizer tubes

Back 259

Induced draft fans

Front 260

An economizer uses the heat energy from the gases of combustion leaving the boiler to heat the ___.

Back 260

Feedwater

Front 261

An economizer uses the heat energy from the gases of combustion leaving the boiler to heat the ___.

Back 261

Feedwater

Front 262

Turbine feedwater pumps are ___.

Back 262

Positive-displacement pumps

Front 263

An economizer uses the heat energy from the gases of combustion leaving the boiler to heat the ___.

Back 263

Feedwater

Front 264

Turbine feedwater pumps are ___.

Back 264

Positive-displacement pumps

Front 265

A turbine feedwater pump must be equipped with a(n)___ on the discharge line to protect the pump from excessive pressure

Back 265

Relief valve

Front 266

Water that is too hot in the open feedwater heater can cause ___.

Back 266

The feedwater pump to become steambound

Front 267

Water that is too hot in the open feedwater heater can cause ___.

Back 267

The feedwater pump to become steambound

Front 268

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 268

Oxygen pitting in a boiler

Front 269

Water that is too hot in the open feedwater heater can cause ___.

Back 269

The feedwater pump to become steambound

Front 270

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 270

Oxygen pitting in a boiler

Front 271

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 271

Impeller

Front 272

Water that is too hot in the open feedwater heater can cause ___.

Back 272

The feedwater pump to become steambound

Front 273

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 273

Oxygen pitting in a boiler

Front 274

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 274

Impeller

Front 275

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 275

Closed feedwater heater

Front 276

Water that is too hot in the open feedwater heater can cause ___.

Back 276

The feedwater pump to become steambound

Front 277

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 277

Oxygen pitting in a boiler

Front 278

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 278

Impeller

Front 279

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 279

Closed feedwater heater

Front 280

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 280

Manual reset

Front 281

Water that is too hot in the open feedwater heater can cause ___.

Back 281

The feedwater pump to become steambound

Front 282

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 282

Oxygen pitting in a boiler

Front 283

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 283

Impeller

Front 284

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 284

Closed feedwater heater

Front 285

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 285

Manual reset

Front 286

One way to increase the efficiency of a plant is to ___.

Back 286

Recover as much heat as possible from the fuel

Front 287

Water that is too hot in the open feedwater heater can cause ___.

Back 287

The feedwater pump to become steambound

Front 288

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 288

Oxygen pitting in a boiler

Front 289

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 289

Impeller

Front 290

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 290

Closed feedwater heater

Front 291

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 291

Manual reset

Front 292

One way to increase the efficiency of a plant is to ___.

Back 292

Recover as much heat as possible from the fuel

Front 293

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 293

Water column

Front 294

Water that is too hot in the open feedwater heater can cause ___.

Back 294

The feedwater pump to become steambound

Front 295

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 295

Oxygen pitting in a boiler

Front 296

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 296

Impeller

Front 297

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 297

Closed feedwater heater

Front 298

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 298

Manual reset

Front 299

One way to increase the efficiency of a plant is to ___.

Back 299

Recover as much heat as possible from the fuel

Front 300

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 300

Water column

Front 301

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 301

1

Front 302

Water that is too hot in the open feedwater heater can cause ___.

Back 302

The feedwater pump to become steambound

Front 303

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 303

Oxygen pitting in a boiler

Front 304

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 304

Impeller

Front 305

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 305

Closed feedwater heater

Front 306

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 306

Manual reset

Front 307

One way to increase the efficiency of a plant is to ___.

Back 307

Recover as much heat as possible from the fuel

Front 308

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 308

Water column

Front 309

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 309

1

Front 310

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 310

Swell

Front 311

Water that is too hot in the open feedwater heater can cause ___.

Back 311

The feedwater pump to become steambound

Front 312

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 312

Oxygen pitting in a boiler

Front 313

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 313

Impeller

Front 314

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 314

Closed feedwater heater

Front 315

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 315

Manual reset

Front 316

One way to increase the efficiency of a plant is to ___.

Back 316

Recover as much heat as possible from the fuel

Front 317

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 317

Water column

Front 318

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 318

1

Front 319

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 319

Swell

Front 320

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 320

Float

Front 321

Water that is too hot in the open feedwater heater can cause ___.

Back 321

The feedwater pump to become steambound

Front 322

A three-elemet feedwater regulator measures the steam flow from the boiler, the ___ into the boiler, and the water level

Back 322

Feedwater flow

Front 323

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 323

Oxygen pitting in a boiler

Front 324

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 324

Impeller

Front 325

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 325

Closed feedwater heater

Front 326

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 326

Manual reset

Front 327

One way to increase the efficiency of a plant is to ___.

Back 327

Recover as much heat as possible from the fuel

Front 328

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 328

Water column

Front 329

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 329

1

Front 330

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 330

Swell

Front 331

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 331

Float

Front 332

Water that is too hot in the open feedwater heater can cause ___.

Back 332

The feedwater pump to become steambound

Front 333

A three-elemet feedwater regulator measures the steam flow from the boiler, the ___ into the boiler, and the water level

Back 333

Feedwater flow

Front 334

After blowing down a thermohydraulic feedwater regulator, approximately 60 min should be allowed for the regulator to ___ before being returned to service

Back 334

Stabilize

Front 335

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 335

Oxygen pitting in a boiler

Front 336

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 336

Impeller

Front 337

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 337

Closed feedwater heater

Front 338

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 338

Manual reset

Front 339

One way to increase the efficiency of a plant is to ___.

Back 339

Recover as much heat as possible from the fuel

Front 340

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 340

Water column

Front 341

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 341

1

Front 342

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 342

Swell

Front 343

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 343

Float

Front 344

Water that is too hot in the open feedwater heater can cause ___.

Back 344

The feedwater pump to become steambound

Front 345

A three-elemet feedwater regulator measures the steam flow from the boiler, the ___ into the boiler, and the water level

Back 345

Feedwater flow

Front 346

After blowing down a thermohydraulic feedwater regulator, approximately 60 min should be allowed for the regulator to ___ before being returned to service

Back 346

Stabilize

Front 347

A(n)___ is used in applications where there are varying flows of condensate and additional condensate storage capacity is required

Back 347

Surge tank

Front 348

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 348

Oxygen pitting in a boiler

Front 349

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 349

Impeller

Front 350

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 350

Closed feedwater heater

Front 351

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 351

Manual reset

Front 352

One way to increase the efficiency of a plant is to ___.

Back 352

Recover as much heat as possible from the fuel

Front 353

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 353

Water column

Front 354

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 354

1

Front 355

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 355

Swell

Front 356

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 356

Float

Front 357

Water that is too hot in the open feedwater heater can cause ___.

Back 357

The feedwater pump to become steambound

Front 358

A three-elemet feedwater regulator measures the steam flow from the boiler, the ___ into the boiler, and the water level

Back 358

Feedwater flow

Front 359

After blowing down a thermohydraulic feedwater regulator, approximately 60 min should be allowed for the regulator to ___ before being returned to service

Back 359

Stabilize

Front 360

A(n)___ is used in applications where there are varying flows of condensate and additional condensate storage capacity is required

Back 360

Surge tank

Front 361

The ____ pump uses the shape of it’s casing to direct the discharge

Back 361

Centrifugal

Front 362

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 362

Oxygen pitting in a boiler

Front 363

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 363

Impeller

Front 364

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 364

Closed feedwater heater

Front 365

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 365

Manual reset

Front 366

One way to increase the efficiency of a plant is to ___.

Back 366

Recover as much heat as possible from the fuel

Front 367

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 367

Water column

Front 368

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 368

1

Front 369

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 369

Swell

Front 370

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 370

Float

Front 371

Water that is too hot in the open feedwater heater can cause ___.

Back 371

The feedwater pump to become steambound

Front 372

A three-elemet feedwater regulator measures the steam flow from the boiler, the ___ into the boiler, and the water level

Back 372

Feedwater flow

Front 373

After blowing down a thermohydraulic feedwater regulator, approximately 60 min should be allowed for the regulator to ___ before being returned to service

Back 373

Stabilize

Front 374

A(n)___ is used in applications where there are varying flows of condensate and additional condensate storage capacity is required

Back 374

Surge tank

Front 375

The ____ pump uses the shape of it’s casing to direct the discharge

Back 375

Centrifugal

Front 376

Some boiler rooms use ___ pumps for reserve or back-up units in the event of an electrical power failure

Back 376

Reciprocating

Front 377

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 377

Oxygen pitting in a boiler

Front 378

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 378

Impeller

Front 379

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 379

Closed feedwater heater

Front 380

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 380

Manual reset

Front 381

One way to increase the efficiency of a plant is to ___.

Back 381

Recover as much heat as possible from the fuel

Front 382

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 382

Water column

Front 383

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 383

1

Front 384

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 384

Swell

Front 385

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 385

Float

Front 386

Water that is too hot in the open feedwater heater can cause ___.

Back 386

The feedwater pump to become steambound

Front 387

A three-elemet feedwater regulator measures the steam flow from the boiler, the ___ into the boiler, and the water level

Back 387

Feedwater flow

Front 388

After blowing down a thermohydraulic feedwater regulator, approximately 60 min should be allowed for the regulator to ___ before being returned to service

Back 388

Stabilize

Front 389

A(n)___ is used in applications where there are varying flows of condensate and additional condensate storage capacity is required

Back 389

Surge tank

Front 390

The ____ pump uses the shape of it’s casing to direct the discharge

Back 390

Centrifugal

Front 391

Some boiler rooms use ___ pumps for reserve or back-up units in the event of an electrical power failure

Back 391

Reciprocating

Front 392

A(n) ___ feedwater heater allows steam and feedwater to mix with each other at atmospheric pressure to raise the temperature of the water

Back 392

Open

Front 393

Water temperatures that are too low in an open feedwater heater will cause ___.

Back 393

Oxygen pitting in a boiler

Front 394

The ___ of a centrifugal feedwater pump is the rotating element that imparts centrifugal force to the liquid

Back 394

Impeller

Front 395

Plant efficiency is increased when a(n) ___ uses steam that is bled or extracted from a steam turbine

Back 395

Closed feedwater heater

Front 396

If only one low-water fuel cutoff is used, it must have a(n) ___.

Back 396

Manual reset

Front 397

One way to increase the efficiency of a plant is to ___.

Back 397

Recover as much heat as possible from the fuel

Front 398

A ___ is a boiler fitting that reduces the turbulence of boiler water to make it easier to measure the water level

Back 398

Water column

Front 399

The piping that connects a water column to the boiler must be a minimum of ___”. And must meet the ASME Code requirements for pressure and temperature

Back 399

1

Front 400

___ is the process where the water level in a boiler momentarily rises with an increase in steam demand

Back 400

Swell

Front 401

___ feedwater regulators are found on package firetube or watertube boilers where feedwater pumps run either intermittently or continuously

Back 401

Float

Front 402

Boiler water is treated to prevent ___.

Back 402

Scale, oxygen pitting, caustic embrittlement

Front 403

Boiler water is treated to prevent ___.

Back 403

Scale, oxygen pitting, caustic embrittlement

Front 404

Hardness is a measure of scale-forming ___ dissolved in water

Back 404

Minerals

Front 405

Boiler water is treated to prevent ___.

Back 405

Scale, oxygen pitting, caustic embrittlement

Front 406

Hardness is a measure of scale-forming ___ dissolved in water

Back 406

Minerals

Front 407

Boiler water having high alkalinity could develop ___.

Back 407

Caustic embrittlement

Front 408

Boiler water is treated to prevent ___.

Back 408

Scale, oxygen pitting, caustic embrittlement

Front 409

Hardness is a measure of scale-forming ___ dissolved in water

Back 409

Minerals

Front 410

Boiler water having high alkalinity could develop ___.

Back 410

Caustic embrittlement

Front 411

Deposits of calcium and magnesium carbonates on the boiler heating surface cause ___.

Back 411

Scale

Front 412

Boiler water is treated to prevent ___.

Back 412

Scale, oxygen pitting, caustic embrittlement

Front 413

Hardness is a measure of scale-forming ___ dissolved in water

Back 413

Minerals

Front 414

Boiler water having high alkalinity could develop ___.

Back 414

Caustic embrittlement

Front 415

Deposits of calcium and magnesium carbonates on the boiler heating surface cause ___.

Back 415

Scale

Front 416

Pitting and channeling of boiler metal in the water are caused by ___.

Back 416

Oxygen and carbon dioxide

Front 417

Boiler water is treated to prevent ___.

Back 417

Scale, oxygen pitting, caustic embrittlement

Front 418

Hardness is a measure of scale-forming ___ dissolved in water

Back 418

Minerals

Front 419

Boiler water having high alkalinity could develop ___.

Back 419

Caustic embrittlement

Front 420

Deposits of calcium and magnesium carbonates on the boiler heating surface cause ___.

Back 420

Scale

Front 421

Pitting and channeling of boiler metal in the water are caused by ___.

Back 421

Oxygen and carbon dioxide

Front 422

Chemicals added to the boiler water change the scale-forming salts into a(n) ___.

Back 422

Nonadhering sludge

Front 423

___ is small water particles and impurities carried out of the boiler into the steam lines

Back 423

Carryover

Front 424

___ is small water particles and impurities carried out of the boiler into the steam lines

Back 424

Carryover

Front 425

Surface tension on the water in a steam drum is increased by ___.

Back 425

Impurities that float on the water surface

Front 426

___ is small water particles and impurities carried out of the boiler into the steam lines

Back 426

Carryover

Front 427

Surface tension on the water in a steam drum is increased by ___.

Back 427

Impurities that float on the water surface

Front 428

A direct cause of overheating of the boiler tubes is ___.

Back 428

Scale formation on the tubes

Front 429

___ is small water particles and impurities carried out of the boiler into the steam lines

Back 429

Carryover

Front 430

Surface tension on the water in a steam drum is increased by ___.

Back 430

Impurities that float on the water surface

Front 431

A direct cause of overheating of the boiler tubes is ___.

Back 431

Scale formation on the tubes

Front 432

Priming is dangerous and can lead to ___ hammer

Back 432

Water

Front 433

___ is small water particles and impurities carried out of the boiler into the steam lines

Back 433

Carryover

Front 434

Surface tension on the water in a steam drum is increased by ___.

Back 434

Impurities that float on the water surface

Front 435

A direct cause of overheating of the boiler tubes is ___.

Back 435

Scale formation on the tubes

Front 436

Priming is dangerous and can lead to ___ hammer

Back 436

Water

Front 437

Scale buildup on the waterside of a steam boiler is caused by ___.

Back 437

Improper boiler water treatment

Front 438

___ is small water particles and impurities carried out of the boiler into the steam lines

Back 438

Carryover

Front 439

Surface tension on the water in a steam drum is increased by ___.

Back 439

Impurities that float on the water surface

Front 440

A direct cause of overheating of the boiler tubes is ___.

Back 440

Scale formation on the tubes

Front 441

Priming is dangerous and can lead to ___ hammer

Back 441

Water

Front 442

Scale buildup on the waterside of a steam boiler is caused by ___.

Back 442

Improper boiler water treatment

Front 443

Trace amounts of dissolved oxygen in the boiler are removed by ___.

Back 443

Adding sodium sulfite to the feedwater

Front 444

The required frequency for blowing down a steam boiler is best determined by the ___.

Back 444

Boiler water analysis

Front 445

The required frequency for blowing down a steam boiler is best determined by the ___.

Back 445

Boiler water analysis

Front 446

A cold lime-soda softener works at ___.

Back 446

Ambient temperature

Front 447

The required frequency for blowing down a steam boiler is best determined by the ___.

Back 447

Boiler water analysis

Front 448

A cold lime-soda softener works at ___.

Back 448

Ambient temperature

Front 449

___ is a filtration process in which the water is pressurized and applied against the surface of a semipermeable membrane

Back 449

Reverse osmosis

Front 450

The required frequency for blowing down a steam boiler is best determined by the ___.

Back 450

Boiler water analysis

Front 451

A cold lime-soda softener works at ___.

Back 451

Ambient temperature

Front 452

___ is a filtration process in which the water is pressurized and applied against the surface of a semipermeable membrane

Back 452

Reverse osmosis

Front 453

External feedwater conditions the boilerwater before it enters the boiler using a(n) ___ softener

Back 453

Cold lime-soda, hot lime-soda, ion-exchange

Front 454

The required frequency for blowing down a steam boiler is best determined by the ___.

Back 454

Boiler water analysis

Front 455

A cold lime-soda softener works at ___.

Back 455

Ambient temperature

Front 456

___ is a filtration process in which the water is pressurized and applied against the surface of a semipermeable membrane

Back 456

Reverse osmosis

Front 457

External feedwater conditions the boilerwater before it enters the boiler using a(n) ___ softener

Back 457

Cold lime-soda, hot lime-soda, ion-exchange

Front 458

A cold lime-soda softener removes hardness by mixing lime-soda with raw water and passing it through a ___.

Back 458

Catalyst bed

Front 459

An ion-exchange softener uses a resin bed to exchange ___ with ions that cause hardness in order to soften raw water

Back 459

Sodium

Front 460

An ion-exchange softener uses a resin bed to exchange ___ with ions that cause hardness in order to soften raw water

Back 460

Sodium

Front 461

Alkalinity in boiler water is normally measured using a ___.

Back 461

Titration test

Front 462

An ion-exchange softener uses a resin bed to exchange ___ with ions that cause hardness in order to soften raw water

Back 462

Sodium

Front 463

Alkalinity in boiler water is normally measured using a ___.

Back 463

Titration test

Front 464

One reason to perform a bottom blowdown is to ___.

Back 464

Remove sludge from the bottom of the boiler

Front 465

A(n)___ is generally added to the boiler water to protect the condensate lines from carbonic acid

Back 465

Amine

Front 466

A(n)___ is generally added to the boiler water to protect the condensate lines from carbonic acid

Back 466

Amine

Front 467

A disadvantage of a timer-controlled blowdown is that it doesn’t ___.

Back 467

Consider changes to the feedwater

Front 468

A(n)___ is generally added to the boiler water to protect the condensate lines from carbonic acid

Back 468

Amine

Front 469

A disadvantage of a timer-controlled blowdown is that it doesn’t ___.

Back 469

Consider changes to the feedwater

Front 470

A bottom blowdown should be performed at least once every ___.

Back 470

Day

Front 471

A(n)___ is generally added to the boiler water to protect the condensate lines from carbonic acid

Back 471

Amine

Front 472

A disadvantage of a timer-controlled blowdown is that it doesn’t ___.

Back 472

Consider changes to the feedwater

Front 473

A bottom blowdown should be performed at least once every ___.

Back 473

Day

Front 474

A(n) ___ is a feedwater heater that separates oxygen and other gases from the steam before releasing the gases into the atmosphere

Back 474

Deaerator

Front 475

A(n)___ is generally added to the boiler water to protect the condensate lines from carbonic acid

Back 475

Amine

Front 476

A disadvantage of a timer-controlled blowdown is that it doesn’t ___.

Back 476

Consider changes to the feedwater

Front 477

A bottom blowdown should be performed at least once every ___.

Back 477

Day

Front 478

A(n) ___ is a feedwater heater that separates oxygen and other gases from the steam before releasing the gases into the atmosphere

Back 478

Deaerator

Front 479

___ is the rapid fluctuation of the water level that occurs when steam bubbles are trapped below a film of impurities on the surface of the boiler water

Back 479

Foaming