11/21/25, 9:34 AM Q-01 FDNY
Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation/Q-01
FDNY Practice Exam With Complete Questions And Correct Detailed
Answers (Verified Answers) |Already Graded A+|Brand New
Version!! 2026
Any water present in D) frozen expansion valve
the refrigerant side of
a Freon refrigerating
system causes a
A) clogged oil trap
B) frozen discharge valve
C) clogged scale trap
D) frozen expansion
valve
The subcooling effect B) refrigeration effect
of the liquid
refrigerant just before
the expansion valve
causes increased
A) horsepower
B) refrigeration effect
C) expansion valve
capacity
D) refrigerant flow
In a flooded B) passes directly into the suction line
evaporator using an
accumulator and float
valve, flash gas
A) passes directly into
the evaporator
B) passes directly into the
suction line
C) does not occur
/ 1/62
,11/21/25, 9:34 AM Q-01 FDNY
D) stays in the receiver
According to Title 49 B) a minimum of every 5 years
CFR Section
173.34(e), cylinders
and tanks must be
hydrostatically
retested
A) once a year by visual
inspection
B) a minimum of every 5
years
C) every six months
D) a minimum of once
every 2 years
The minimum C) Air in pounds/minute
required rate
discharge
capacity of the
pressure-relief device
or fusible plug for a
refrigerant-containing
vessel is determined
by the following
formula: C = Fd1.
What is "C" equal to?
A) btu/minute
B) Refrigerant pressure
C) Air in pounds/minute
D) Cubic feet/minute
According to the D) 1,000° F and above 400° F
provisions of the rule,
a soldered joint is a
gas-tight joint
/ 2/62
,11/21/25, 9:34 AM Q-01 FDNY
obtained
by the joining of
metallic mixtures or
alloys that melt below
A) 700° F and above
100° F
B) 800° F and above
200° F
C) 900° F and above
350° F
D) 1,000° F and above
400° F
A pressure or A) pressure-limiting device
temperature response
mechanism for
automatically
stopping the
operation of the
pressure-imposing
element is the
A) pressure-limiting
device
B) pressure-relief valve
C) pressure-imposing
device
D) pressure-relief device
The flow of weak B) throttling device
liquor to the absorber
is controlled by
A) gas pressure
B) throttling device
C) float valve
D) pressure of the strong
liquor pump
The best way of C) Nessler reagent
detecting ammonia
/ 3/62
, 11/21/25, 9:34 AM Q-01 FDNY
brine is by using
A) CO2 gas
B) potassium of lime
C) Nessler reagent
D) carbonate of soda
The best time to C) during operation
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
What will make the B) A decrease in evaporator load
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
Which of the following D) A rupture member automatically ruptures at a
statements is predetermined temperature
incorrect?
A) A service valve is a
key-operated shut- off
valve used during
shipment, installation
and repairs
B) Brine is a liquid
/ 4/62
Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation/Q-01
FDNY Practice Exam With Complete Questions And Correct Detailed
Answers (Verified Answers) |Already Graded A+|Brand New
Version!! 2026
Any water present in D) frozen expansion valve
the refrigerant side of
a Freon refrigerating
system causes a
A) clogged oil trap
B) frozen discharge valve
C) clogged scale trap
D) frozen expansion
valve
The subcooling effect B) refrigeration effect
of the liquid
refrigerant just before
the expansion valve
causes increased
A) horsepower
B) refrigeration effect
C) expansion valve
capacity
D) refrigerant flow
In a flooded B) passes directly into the suction line
evaporator using an
accumulator and float
valve, flash gas
A) passes directly into
the evaporator
B) passes directly into the
suction line
C) does not occur
/ 1/62
,11/21/25, 9:34 AM Q-01 FDNY
D) stays in the receiver
According to Title 49 B) a minimum of every 5 years
CFR Section
173.34(e), cylinders
and tanks must be
hydrostatically
retested
A) once a year by visual
inspection
B) a minimum of every 5
years
C) every six months
D) a minimum of once
every 2 years
The minimum C) Air in pounds/minute
required rate
discharge
capacity of the
pressure-relief device
or fusible plug for a
refrigerant-containing
vessel is determined
by the following
formula: C = Fd1.
What is "C" equal to?
A) btu/minute
B) Refrigerant pressure
C) Air in pounds/minute
D) Cubic feet/minute
According to the D) 1,000° F and above 400° F
provisions of the rule,
a soldered joint is a
gas-tight joint
/ 2/62
,11/21/25, 9:34 AM Q-01 FDNY
obtained
by the joining of
metallic mixtures or
alloys that melt below
A) 700° F and above
100° F
B) 800° F and above
200° F
C) 900° F and above
350° F
D) 1,000° F and above
400° F
A pressure or A) pressure-limiting device
temperature response
mechanism for
automatically
stopping the
operation of the
pressure-imposing
element is the
A) pressure-limiting
device
B) pressure-relief valve
C) pressure-imposing
device
D) pressure-relief device
The flow of weak B) throttling device
liquor to the absorber
is controlled by
A) gas pressure
B) throttling device
C) float valve
D) pressure of the strong
liquor pump
The best way of C) Nessler reagent
detecting ammonia
/ 3/62
, 11/21/25, 9:34 AM Q-01 FDNY
brine is by using
A) CO2 gas
B) potassium of lime
C) Nessler reagent
D) carbonate of soda
The best time to C) during operation
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
What will make the B) A decrease in evaporator load
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
Which of the following D) A rupture member automatically ruptures at a
statements is predetermined temperature
incorrect?
A) A service valve is a
key-operated shut- off
valve used during
shipment, installation
and repairs
B) Brine is a liquid
/ 4/62
