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FDNY Q-01 EXAM | Comprehensive
Q&A For Certification Success
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
C) valves must be locked
D) the system must be able to run without it - correct-answer -B) a safety valve
must be installed
On a 220 volt, three phase, 4-wire electric service, any line will read
A) 220 volts
B) 440 volts
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C) 70 volts
D) 110 volts - correct-answer -D) 110 volts
If the specific heat of glass is .196, how many btu are needed to raise the
temperature of 10 pounds of glass from 50° F to 70°F?
A) 40.2
B) 39.2
C) 59.2
D) 36.2 - correct-answer -B) 39.2
A direct expansion (bare) coil evaporator is used to maintain a meat storage space
at 28 to 30° F. The last coil has no frost. It can be said that this system is
A) condition is acceptable to maintain a high plant efficiency
B) is a direct indication of air in the system
C) indicates moisture in the refrigerant
D) is a direct indication that the coil is being starved - correct-answer -D) is a
direct indication that the coil is being starved
Fuses and circuit breakers are safety devices for electric motors but they will not
protect motors against
A) short circuit
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B) heavy overload
C) burnout
D) overheating - correct-answer -D) overheating
Sodium chloride is not used when the temperature is
A) -20° F
B) 10° F
C) 5° F
D) 0° F - correct-answer -A) -20° F
The speed of a six-pole, 50-cycle motor is
A) 600 RPM
B) 1000 RPM
C) 1800 RPM
D) 3600 RPM - correct-answer -B) 1000 RPM
The rated discharge capacity of the pressure-relief device or fusible plug for a
refrigerant-containing vessel is determined by the formula C = Fd1. "C" equals
A) btu/minute
B) refrigerant pressure
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C) air in pounds/minute
D) cubic feet/minute - correct-answer -C) air in pounds/minute
In an automatically operated, flooded shell-and-tube cooler, an electric float
switch is used primarily to
A) control the flow of brine into the tubes
B) control the flow of refrigerant into the shell
C) purge the oil from the cooler
D) purge non-condensable gas from the cooler - correct-answer -B) control the
flow of refrigerant into the shell
What are three reasons why compressors short cycle? - correct-answer -1. Leaky
solenoid valve
2. Dirty or iced evaporator
3. Lack of refrigerant
Find the volume of a cylinder 8" in diameter with a 10" stroke. How much water
can be put in this cylinder? - correct-answer -V = πR2 x L
V = 3.14 x 42 x 10
V = 3.14 x 16 x 10
V = 3.14 x 160
FDNY Q-01 EXAM | Comprehensive
Q&A For Certification Success
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
C) valves must be locked
D) the system must be able to run without it - correct-answer -B) a safety valve
must be installed
On a 220 volt, three phase, 4-wire electric service, any line will read
A) 220 volts
B) 440 volts
,2|Page
C) 70 volts
D) 110 volts - correct-answer -D) 110 volts
If the specific heat of glass is .196, how many btu are needed to raise the
temperature of 10 pounds of glass from 50° F to 70°F?
A) 40.2
B) 39.2
C) 59.2
D) 36.2 - correct-answer -B) 39.2
A direct expansion (bare) coil evaporator is used to maintain a meat storage space
at 28 to 30° F. The last coil has no frost. It can be said that this system is
A) condition is acceptable to maintain a high plant efficiency
B) is a direct indication of air in the system
C) indicates moisture in the refrigerant
D) is a direct indication that the coil is being starved - correct-answer -D) is a
direct indication that the coil is being starved
Fuses and circuit breakers are safety devices for electric motors but they will not
protect motors against
A) short circuit
,3|Page
B) heavy overload
C) burnout
D) overheating - correct-answer -D) overheating
Sodium chloride is not used when the temperature is
A) -20° F
B) 10° F
C) 5° F
D) 0° F - correct-answer -A) -20° F
The speed of a six-pole, 50-cycle motor is
A) 600 RPM
B) 1000 RPM
C) 1800 RPM
D) 3600 RPM - correct-answer -B) 1000 RPM
The rated discharge capacity of the pressure-relief device or fusible plug for a
refrigerant-containing vessel is determined by the formula C = Fd1. "C" equals
A) btu/minute
B) refrigerant pressure
, 4|Page
C) air in pounds/minute
D) cubic feet/minute - correct-answer -C) air in pounds/minute
In an automatically operated, flooded shell-and-tube cooler, an electric float
switch is used primarily to
A) control the flow of brine into the tubes
B) control the flow of refrigerant into the shell
C) purge the oil from the cooler
D) purge non-condensable gas from the cooler - correct-answer -B) control the
flow of refrigerant into the shell
What are three reasons why compressors short cycle? - correct-answer -1. Leaky
solenoid valve
2. Dirty or iced evaporator
3. Lack of refrigerant
Find the volume of a cylinder 8" in diameter with a 10" stroke. How much water
can be put in this cylinder? - correct-answer -V = πR2 x L
V = 3.14 x 42 x 10
V = 3.14 x 16 x 10
V = 3.14 x 160
