Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
Overheated oil in fired heater's tubes breaks down to form: 1) Clinkers 2) Ash 3) Coke 4) Carbonic acid 5) paraffin |
Coke |
|
The maximum temperature of oil which can be pumped by a hot oil pump when teflon is used as a non-metallic part of the mechanical seal is: 1) 150ºC 2) 350ºC 3) 250ºC 4) 200ºC 5) 100ºC |
200ºC |
|
In a hot oil system, there is a protective device called a "surge tank low oil level". What is the function of this device? 1) Shuts down the pilot burner only 2) Prevents loss of suction to the pump 3) Stops the flow of the thermal fluid 4) Reduces the firing rate to its minimum 5) Shuts down the flare stack |
Prevents loss of suction to the pump |
|
The most typical fired heater model is the: 1) Induced-draft 2) Dual-draft 3) Balanced-draft 4) Down-draft 5) Up-draft |
Up-draft |
|
After a hot oil system has been shut down, what is the recommended circulation time for the hot oil? 1) 30 minutes 2) 60 minutes 3) 5 minutes 4) 45 minutes |
30 minutes |
|
The approximate efficiency of a hot oil radiant heater is: 1) 30 - 40% 2) 25 - 35% 3) 40 - 50% 4) 50 - 60% 5) 45 - 65% |
40 - 50% |
|
The initial fill of a hot oil system surge tank is done by: 1) Bulk truck 2) Use of a vacuum pump 3) Bucket brigade 4) Pipe line 5) Field pressure |
Bulk truck |
|
Structural support beams that strengthen and support furnace heaters are mounted on: 1) Concrete saddles 2) Concrete pads 3) Concrete piers 4) Concrete cement 5) Steel bedplates |
Concrete piers |
|
An emergency shutdown (ESD) is _____ activated. 1) Sequentially 2) Systematically 3) Automatically 4) Hydraulically 5) Manually |
Manually |
|
Hot oil fired heaters have how many burners? 1) 2 - 10 2) 2 - 20 3) 10 - 50 4) 1 - 100 5) 4 - 40 |
2 - 20 |
|
The safety valve on the discharge side of the pump in a hot oil system discharges to the: 1) Surge tank 2) Combustion chamber 3) Flare stack 4) Drain pit 5) Hot oil user |
Surge tank |
|
Flange faces used in hot oil system construction should be: 1) Grooved and raised 2) Smooth and raised 3) Grooved and recessed 4) Threaded 5) Smooth and recessed |
Smooth and raised |
|
Hot oil convection heaters have an approximate efficiency of: 1) 70 - 80% 2) 85 - 95% 3) 80 - 90% 4) 55 - 65% 5) 75 - 85% |
75 - 85% |
|
In order to keep some hot oil flowing backwards through a standby pump and around the discharge check valve, it is important that the _____ valve be left open. 1) Automatic 2) Pneumatic 3) Relief 4) Suction 5) Bypass |
Suction |
|
A temperature and pressure which could be expected at the exit of a fired hot oil heater is between: 1) 235 to 290ºC and 450 kPa 2) 120ºC and 60 kPa 3) 150 to 300ºC and 400 kPa 4) 450 to 500ºC and 255 kPa 5) 60ºC and 120 kPa |
235 to 290ºC and 450 kPa |
|
In order to avoid unstable burner operation in the event of high or low fuel gas pressure, hot oil heaters are equipped with: 1) A pilot burner flame failure device 2) A by-pass line and a sump tank 3) A high stack temperature switch 4) An emergency shutdown device 5) A high or low fuel gas pressure shut down device |
A high or low fuel gas pressure shut down device |
|
Coking of hot oil in heater tubes would begin to take place at: 1) 350ºC 2) 260ºC 3) 150ºC 4) 275ºC 5) 200ºC |
260ºC |
|
With regard to oil leaving each heater pass, what is of particular importance? 1) Pressure 2) Temperature 3) Flash point 4) Volume 5) Velocity |
Temperature |
|
A hot oil pump suction strainer should be inspected and cleaned after how long following initial circulation of hot oil through the system? 1) 1 - 2 hours 2) 6 - 8 hours 3) 3 - 4 hours 4) 5 - 6 hours 5) 4 - 5 hours |
3 - 4 hours |