Q-01 FDNY EXAM PRACTICE QUESTIONS
WITH VERIFIED SOLUIONS GRADED A+
NEW MODIFIED EXAM TESTED AND
APPROVED!!
In an absorption system, the medium normally used to vaporize refrigerant and
increase its temperature is
A) water
B) propane
C) ethylene
D) steam --CORRECT ANSWER--D) steam
Any water present in 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 --CORRECT ANSWER--D) frozen expansion valve
The subcooling effect of the liquid refrigerant just before the expansion valve
causes increased
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,A) horsepower
B) refrigeration effect
C) expansion valve capacity
D) refrigerant flow --CORRECT ANSWER--B) refrigeration effect
In a flooded 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
D) stays in the receiver --CORRECT ANSWER--B) passes directly into the
suction line
According to Title 49 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 --CORRECT ANSWER--B) a minimum
of every 5 years
The minimum 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?
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,A) btu/minute
B) Refrigerant pressure
C) Air in pounds/minute
D) Cubic feet/minute --CORRECT ANSWER--C) Air in pounds/minute
According to the provisions of the rule, a soldered joint is a gas-tight joint
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 --CORRECT ANSWER--D) 1,000° F and above
400° F
A pressure or 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 --CORRECT ANSWER--A) pressure-limiting device
The flow of weak liquor to the absorber is controlled by
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, A) gas pressure
B) throttling device
C) float valve
D) pressure of the strong liquor pump --CORRECT 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 --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
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WITH VERIFIED SOLUIONS GRADED A+
NEW MODIFIED EXAM TESTED AND
APPROVED!!
In an absorption system, the medium normally used to vaporize refrigerant and
increase its temperature is
A) water
B) propane
C) ethylene
D) steam --CORRECT ANSWER--D) steam
Any water present in 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 --CORRECT ANSWER--D) frozen expansion valve
The subcooling effect of the liquid refrigerant just before the expansion valve
causes increased
Page 1 of 52
,A) horsepower
B) refrigeration effect
C) expansion valve capacity
D) refrigerant flow --CORRECT ANSWER--B) refrigeration effect
In a flooded 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
D) stays in the receiver --CORRECT ANSWER--B) passes directly into the
suction line
According to Title 49 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 --CORRECT ANSWER--B) a minimum
of every 5 years
The minimum 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?
Page 2 of 52
,A) btu/minute
B) Refrigerant pressure
C) Air in pounds/minute
D) Cubic feet/minute --CORRECT ANSWER--C) Air in pounds/minute
According to the provisions of the rule, a soldered joint is a gas-tight joint
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 --CORRECT ANSWER--D) 1,000° F and above
400° F
A pressure or 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 --CORRECT ANSWER--A) pressure-limiting device
The flow of weak liquor to the absorber is controlled by
Page 3 of 52
, A) gas pressure
B) throttling device
C) float valve
D) pressure of the strong liquor pump --CORRECT 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 --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
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