Q-01 FDNY EXAM REAL EXAM 2026 |
UPDATED QUESTIONS AND CORRECT
ANSWERS | VERIFIED ANSWERS |
BRAND NEW VERSION!
The best way of detecting ammonia brine is by using
A) CO2 gas
B) potassium of lime
C) Nessler reagent
D) carbonate of soda ---------CORRECT 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
C) during operation
D) none of the above ---------CORRECT 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 ---------CORRECT 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 ---------CORRECT ANSWER-----------------D) A rupture
member automatically ruptures at a predetermined temperature
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 ---------CORRECT ANSWER-----------------D) not
contain moisture
In an NH3 dry expansion evaporator with TXV and bulb clamped
properly on the outlet of the evaporator, the superheat is
A) 7 to 10° F
B) 5 to 9° F
C) 20 to 30° F
D) 1 to 2° F ---------CORRECT ANSWER-----------------A) 7 to 10° F
The setting of a fusible plug is
A) 280° F
B) 300° F
C) 380° F
D) 300 psig. ---------CORRECT ANSWER-----------------A) 280° F
If the insulation was removed from the bulb of the expansion valve,
what would happen? ---------CORRECT ANSWER-----------------Flooded
evaporator —the TXV bulb opens in a range from 45 to 85° F. If the
insulation was removed, the bulb would sense the temperature in the
machine room and keep the TXV open, thus flooding the evaporator.
, On the most common three-phase, four-wire service, the voltage
between any phase and neutral should be
A) 105 volts
B) 120 volts
C) 208 volts
D) 220 volts ---------CORRECT ANSWER-----------------B) 120 volts
In a Freon refrigerating system in which all piping is made up of hard
copper fittings and streamlined "wrought"-type fittings, the joints
should be
A) screwed
B) soldered or brazed
C) flanged with ground faces
D) flanged with lined rubber gaskets ---------CORRECT ANSWER------------
-----B) soldered or brazed
If any piece of equipment can be isolated as a separate unit
A) A gauge must be present
B) a safety valve must be installed
UPDATED QUESTIONS AND CORRECT
ANSWERS | VERIFIED ANSWERS |
BRAND NEW VERSION!
The best way of detecting ammonia brine is by using
A) CO2 gas
B) potassium of lime
C) Nessler reagent
D) carbonate of soda ---------CORRECT 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
C) during operation
D) none of the above ---------CORRECT 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 ---------CORRECT 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 ---------CORRECT ANSWER-----------------D) A rupture
member automatically ruptures at a predetermined temperature
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 ---------CORRECT ANSWER-----------------D) not
contain moisture
In an NH3 dry expansion evaporator with TXV and bulb clamped
properly on the outlet of the evaporator, the superheat is
A) 7 to 10° F
B) 5 to 9° F
C) 20 to 30° F
D) 1 to 2° F ---------CORRECT ANSWER-----------------A) 7 to 10° F
The setting of a fusible plug is
A) 280° F
B) 300° F
C) 380° F
D) 300 psig. ---------CORRECT ANSWER-----------------A) 280° F
If the insulation was removed from the bulb of the expansion valve,
what would happen? ---------CORRECT ANSWER-----------------Flooded
evaporator —the TXV bulb opens in a range from 45 to 85° F. If the
insulation was removed, the bulb would sense the temperature in the
machine room and keep the TXV open, thus flooding the evaporator.
, On the most common three-phase, four-wire service, the voltage
between any phase and neutral should be
A) 105 volts
B) 120 volts
C) 208 volts
D) 220 volts ---------CORRECT ANSWER-----------------B) 120 volts
In a Freon refrigerating system in which all piping is made up of hard
copper fittings and streamlined "wrought"-type fittings, the joints
should be
A) screwed
B) soldered or brazed
C) flanged with ground faces
D) flanged with lined rubber gaskets ---------CORRECT ANSWER------------
-----B) soldered or brazed
If any piece of equipment can be isolated as a separate unit
A) A gauge must be present
B) a safety valve must be installed
