Q-01 FDNY COMPLETE ACTUAL EXAM /
200+ WELL STRUCTURED QUESTIONS AND
CORRECT ANSWERS 2023/2024 LATEST
VERSION.
2 / 24
1. Rupture members,when used in parallel with a relief valve,are not to exceed
% above designed working pressure: 20%
2. Butterfly valve: where can it be used?: Can be used on...
Q-01 FDNY COMPLETE ACTUAL EXAM /
200+ WELL STRUCTURED QUESTIONS AND
CORRECT ANSWERS 2023/2024 LATEST
VERSION.
,1. Rupture members, when used in parallel with a relief valve, are not to exceed
% above designed working pressure: 20%
2. Butterfly valve: where can it be used?: Can be used on the inlet and outlet ofa water pump
3. What electrical motor protection device automatically resets itself?: Thethermal protector
4. 746 watts equals how many kilowatt hours?: .746 kilowatt hours
5. What position is the liquid line service valve normally in?: Back-seated
6. In an operating evaporator, oil stays on top of which refrigerant?: Carbondioxide, R-744
7. At what pressure does the relief valve blow on a high pressure machine?: -
300 psi
8. What would indicate a restriction (such as dirt or scale) in the liquid line?-
: Frost immediately after the restriction
9. What does solubility mean?: The ability of a refrigerant to mix with othersubstances
10. Charging Vapor —In a compression system, where do you charge thevapor?: Suction
side of the compressor at the Suction Service Valve
11. When comparing a brine with s PH of 8 to one with a PH of 10, its alkalinityis:: 100 times
greater (ex. PH 8 to PH 9 is 10 times greater)
12. In an efficiently operating induced draft cooling tower, the leaving water isbetween:: Dry bulb
and wet bulb temperature
13. To produce the desired evaporator temperature, the power input is reduced by keeping head
pressure...: Head pressure as low as possible & suction pressureas high as needed
14. The accumulator is usually between the...: Compressor and evaporator
15. An oiling system in a large centrifugal system should consist of at least...-
: Reservoir, pump and distribution lines
16. In an evaporator that chills brine, the greatest cooling effect on the brineresults from the...:
Boiling of low pressure liquid
17. The flow of weak liquor to the absorber is controlled by
A) gas pressure
B) throttling device
C) float valve
,D) pressure of the strong liquor pump: B) throttling device
18. The best way of detecting ammonia brine is by using
A) CO2 gas
B) potassium of lime
, C) Nessler reagent
D) carbonate of soda: C) Nessler reagent
19. The best time to purge an ammonia plant with 250 lbs. of ammonia is
A) during shut-down, because you will lose ammonia
B) while charging the plant
C) during operation
D) none of the above: C) during operation
20. What will make the strong liquor in the absorber decrease?
A) expansion valve open too much
B) A decrease in evaporator load
C) An increase in evaporator load
D) Too much steam on the generator: B) A decrease in evaporator load
21. Which of the following statements is incorrect?
A) A service valve is a key-operated shut-off valve used during shipment,installation and
repairs
B) Brine is a liquid cooled by refrigeration and used for the transmission ofheat
C) A fusible plug has a set-temperature fusible member to relieve pressure
D) A rupture member automatically ruptures at a predetermined temperature-
: D) A rupture member automatically ruptures at a predetermined temperature
22. Oil in a refrigerant should
A) have a high pour point
B) have a low flash point
C) have a high viscosity
D) not contain moisture: D) not contain moisture
23. In an NH3 dry expansion evaporator with TXV and bulb clamped properlyon the outlet of
the evaporator, the superheat is
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