FDNY Q-01 Exam With Questions
And Correct Answers
Rupture members, when used in parallel with a relief valve, are not to exceed _____%
above designed working pressure
20%
Butterfly valve: where can it be used?
Can be used on the inlet and outlet of a water pump
What electrical motor protection device automatically resets itself?
The thermal protector
746 watts equals how many kilowatt hours?
.746 kilowatt hours
What position is the liquid line service valve normally in?
Back-seated
,In an operating evaporator, oil stays on top of which refrigerant?
Carbon dioxide, R-744
At what pressure does the relief valve blow on a high pressure machine?
300 psi
What would indicate a restriction (such as dirt or scale) in the liquid line?
Frost immediately after the restriction
What does solubility mean?
The ability of a refrigerant to mix with other substances
Charging Vapor —In a compression system, where do you charge the vapor?
Suction side of the compressor at the Suction Service Valve
When comparing a brine with s PH of 8 to one with a PH of 10, its alkalinity is:
100 times greater (ex. PH 8 to PH 9 is 10 times greater)
,In an efficiently operating induced draft cooling tower, the leaving water is between:
Dry bulb and wet bulb temperature
To produce the desired evaporator temperature, the power input is reduced by
keeping head pressure...
Head pressure as low as possible & suction pressure as high as needed
The accumulator is usually between the...
Compressor and evaporator
An oiling system in a large centrifugal system should consist of at least...
Reservoir, pump and distribution lines
In an evaporator that chills brine, the greatest cooling effect on the brine results from
the...
Boiling of low pressure liquid
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
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
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
What will make the strong liquor in the absorber decrease?
A) expansion valve open too much
And Correct Answers
Rupture members, when used in parallel with a relief valve, are not to exceed _____%
above designed working pressure
20%
Butterfly valve: where can it be used?
Can be used on the inlet and outlet of a water pump
What electrical motor protection device automatically resets itself?
The thermal protector
746 watts equals how many kilowatt hours?
.746 kilowatt hours
What position is the liquid line service valve normally in?
Back-seated
,In an operating evaporator, oil stays on top of which refrigerant?
Carbon dioxide, R-744
At what pressure does the relief valve blow on a high pressure machine?
300 psi
What would indicate a restriction (such as dirt or scale) in the liquid line?
Frost immediately after the restriction
What does solubility mean?
The ability of a refrigerant to mix with other substances
Charging Vapor —In a compression system, where do you charge the vapor?
Suction side of the compressor at the Suction Service Valve
When comparing a brine with s PH of 8 to one with a PH of 10, its alkalinity is:
100 times greater (ex. PH 8 to PH 9 is 10 times greater)
,In an efficiently operating induced draft cooling tower, the leaving water is between:
Dry bulb and wet bulb temperature
To produce the desired evaporator temperature, the power input is reduced by
keeping head pressure...
Head pressure as low as possible & suction pressure as high as needed
The accumulator is usually between the...
Compressor and evaporator
An oiling system in a large centrifugal system should consist of at least...
Reservoir, pump and distribution lines
In an evaporator that chills brine, the greatest cooling effect on the brine results from
the...
Boiling of low pressure liquid
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
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
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
What will make the strong liquor in the absorber decrease?
A) expansion valve open too much
