4Th Class Power Engineering Chapter 68

Front 1

One of the first ways to detect a fault in a reciprocating engine is by:

1) Smell

2) Sound

3) Oil consumption

4) Performance efficiency

5) Temperature indication

Back 1

Sound

Front 2

Despite their size and complexity, steam plants are widely used:

1) Because they can be run by untrained personnel

2) Because they can burn solid fuels such as coal and wood

3) Due to their minimal requirement for water

4) As they are easy to place in an urban environment

5) Due to their low effluent of polluting products

Back 2

Because they can burn solid fuels such as coal and wood

Front 3

The crosshead of a steam engine:

1) Never requires any special bearing material

2) Does not require any lubrication

3) Is where linear motion becomes angular motion

4) Imparts linear motion to the connecting rod

5) Imparts angular motion to the piston rod

Back 3

Is where linear motion becomes angular motion

Front 4

In a duplex steam driven pump, the slide valve:

1) Supplies steam to one piston and exhausts steam from the opposite piston

2) Is controlled by the piston

3) Of one piston is controlled by the opposite piston

4) Supplies steam to only one piston

5) Exhausts steam to only one piston

Back 4

Of one piston is controlled by the opposite piston

Front 5

A routine inspection of an operating steam engine should cover first and foremost:

1) Steam temperature

2) Engine speed

3) Drive belts

4) Steam quality

5) Lubricators

Back 5

Lubricators

Front 6

Large power production plants tend to be of the thermal type because they can burn solid fuels and:

1) The heat cycle they use is the most efficient

2) They are the least expensive to build

3) Solid fuels are the most plentiful and the cheapest

4) They require the least amount of manpower

5) The noise level is much less than internal combustion engines

Back 6

The heat cycle they use is the most efficient

Front 7

A prime mover is:

1) A boiler

2) An air compressor

3) A gas turbine

4) An electric motor

5) A centrifugal pump

Back 7

A gas turbine

Front 8

A "prime mover" is a single device that converts any source of energy into mechanical motion. True or false

Back 8

True

Front 9

A steam engine piston:

1) Never requires lubrication

2) Moves fastest at the beginning of its stroke

3) Is lubricated from the crankcase oil by splash method

4) Moves fastest at the end of its stroke

5) Can never have steam applied to either side

Back 9

Moves fastest at the beginning of its stroke

Front 10

A steam engine will have the steam supply to the cylinder shut off once the piston has traveled _____ of its stroke.

1) 15% to 20%

2) 55% to 65%

3) 25% to 35%

4) 90% to 95%

5) 75% to 90%

Back 10

25% to 35%