1|Page
Q-01 FDNY Exam Newest /Q-01 FDNY Exam
Preparation/Q-01 FDNY Practice Exam With Complete
Questions And Correct Detailed Answers With
Rationales (Verified Answers) |Already Graded
A+|Newest Version1!!
When comparing a brine with s PH of 8 to one with a PH
of 10, its alkalinity is: - Answer-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: - Answer-Dry bulb and wet bulb
temperature
To produce the desired evaporator temperature, the power
input is reduced by keeping head pressure... - Answer-
Head pressure as low as possible & suction pressure as
high as needed
The accumulator is usually between the... - Answer-
Compressor and evaporator
An oiling system in a large centrifugal system should
consist of at least... - Answer-Reservoir, pump and
distribution lines
,2|Page
In an evaporator that chills brine, the greatest cooling
effect on the brine results from the... - Answer-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 - Answer-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 - Answer-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
,3|Page
C) during operation
D) none of the above - Answer-C) during operation
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 - Answer-B) A
decrease in evaporator load
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 of heat
C) A fusible plug has a set-temperature fusible member to
relieve pressure
D) A rupture member automatically ruptures at a
predetermined temperature - Answer-D) A rupture
member automatically ruptures at a predetermined
temperature
, 4|Page
Rupture members, when used in parallel with a relief
valve, are not to exceed _____% above designed working
pressure - Answer-20%
Butterfly valve: where can it be used? - Answer-Can be
used on the inlet and outlet of a water pump
What electrical motor protection device automatically
resets itself? - Answer-The thermal protector
746 watts equals how many kilowatt hours? - Answer-.746
kilowatt hours
What position is the liquid line service valve normally in? -
Answer-Back-seated
In an operating evaporator, oil stays on top of which
refrigerant? - Answer-Carbon dioxide, R-744
At what pressure does the relief valve blow on a high
pressure machine? - Answer-300 psi
Q-01 FDNY Exam Newest /Q-01 FDNY Exam
Preparation/Q-01 FDNY Practice Exam With Complete
Questions And Correct Detailed Answers With
Rationales (Verified Answers) |Already Graded
A+|Newest Version1!!
When comparing a brine with s PH of 8 to one with a PH
of 10, its alkalinity is: - Answer-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: - Answer-Dry bulb and wet bulb
temperature
To produce the desired evaporator temperature, the power
input is reduced by keeping head pressure... - Answer-
Head pressure as low as possible & suction pressure as
high as needed
The accumulator is usually between the... - Answer-
Compressor and evaporator
An oiling system in a large centrifugal system should
consist of at least... - Answer-Reservoir, pump and
distribution lines
,2|Page
In an evaporator that chills brine, the greatest cooling
effect on the brine results from the... - Answer-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 - Answer-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 - Answer-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
,3|Page
C) during operation
D) none of the above - Answer-C) during operation
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 - Answer-B) A
decrease in evaporator load
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 of heat
C) A fusible plug has a set-temperature fusible member to
relieve pressure
D) A rupture member automatically ruptures at a
predetermined temperature - Answer-D) A rupture
member automatically ruptures at a predetermined
temperature
, 4|Page
Rupture members, when used in parallel with a relief
valve, are not to exceed _____% above designed working
pressure - Answer-20%
Butterfly valve: where can it be used? - Answer-Can be
used on the inlet and outlet of a water pump
What electrical motor protection device automatically
resets itself? - Answer-The thermal protector
746 watts equals how many kilowatt hours? - Answer-.746
kilowatt hours
What position is the liquid line service valve normally in? -
Answer-Back-seated
In an operating evaporator, oil stays on top of which
refrigerant? - Answer-Carbon dioxide, R-744
At what pressure does the relief valve blow on a high
pressure machine? - Answer-300 psi
