Q 01 FDNY Exam Newest /Q 01 FDNY Exam Preparation/Q 01
FDNY Practice Exam With Complete Questions And Correct
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Q-01 FDNY Exam Practice Questions (1-25)
1. Desirable characteristics of a refrigerant:
A) High __________
B) Low __________
Answer:
A) High critical point
B) Low freezing point
2. Centrifugal Feed Water Pump - Start-up procedure:
Answer:
1. Lock-out, tag-out
2. Close discharge valve
3. Open suction valve
4. Turn on
5. Open discharge valve
3. Centrifugal Feed Water Pump - Shut-down procedure:
Answer:
1. Lock-out, tag-out
2. Close suction valve
3. Close discharge valve
,4. In order to vary the capacity of an absorption plant, you should regulate the...
Answer: Flow of the water to the condenser
5. 600,000 btu per hour equals how many tons of refrigeration?
A) 300
B) 3,000
C) 500
D) 50
Answer: D) 50
*Rationale: One ton of refrigeration equals 12,000 BTU per hour. Therefore,
600,000 ÷ 12,000 = 50 tons.*
6. Heat transfer takes place by:
A) evaporation, conduction and condensation
B) radiation, conduction and convection
C) condensation, evaporation and radiation
D) sublimation, evaporation and convection
Answer: B) radiation, conduction and convection
Rationale: These are the three primary methods of heat transfer in
thermodynamics.
7. Refrigerant recovery is defined as:
A) Removing the refrigerant from a system and storing it in an external container,
with the lowest emissions possible
B) Reprocessing a refrigerant into a new product that can be reused in another
system
C) The process of cleaning a refrigerant of dirt and contaminants
D) None of the above
Answer: A) Removing the refrigerant from a system and storing it in an external
container, with the lowest emissions possible
8. A 10-ton refrigeration unit has a capacity of:
A) 2,000 btu/minute
B) 12,000 btu/minute
,C) 20,000 btu/minute
D) 144,000 btu/day
Answer: A) 2,000 btu/minute
*Rationale: 1 ton = 12,000 BTU/hour = 200 BTU/minute. 10 tons × 200
BTU/minute = 2,000 BTU/minute.*
9. In an absorption system, the medium normally used to vaporize refrigerant
and increase its temperature is:
A) water
B) propane
C) ethylene
D) steam
Answer: D) steam
10. 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
Answer: D) frozen expansion valve
Rationale: Water in Freon systems can freeze at the expansion valve, causing
blockages.
11. The subcooling effect of the liquid refrigerant just before the expansion
valve causes increased:
A) horsepower
B) refrigeration effect
C) expansion valve capacity
D) refrigerant flow
Answer: B) refrigeration effect
12. 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
Answer: B) passes directly into the suction line
13. 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
Answer: B) a minimum of every 5 years
14. The minimum required rate discharge capacity of the pressure-relief device
or fusible plug for a refrigerant-containing vessel is determined by the formula C
= Fd1. What is "C" equal to?
A) btu/minute
B) Refrigerant pressure
C) Air in pounds/minute
D) Cubic feet/minute
Answer: C) Air in pounds/minute
15. 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
Answer: D) 1,000° F and above 400° F
16. 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
FDNY Practice Exam With Complete Questions And Correct
Detailed Answers (Verified Answers) |Already Graded
A+|Brand New Version!!
Q-01 FDNY Exam Practice Questions (1-25)
1. Desirable characteristics of a refrigerant:
A) High __________
B) Low __________
Answer:
A) High critical point
B) Low freezing point
2. Centrifugal Feed Water Pump - Start-up procedure:
Answer:
1. Lock-out, tag-out
2. Close discharge valve
3. Open suction valve
4. Turn on
5. Open discharge valve
3. Centrifugal Feed Water Pump - Shut-down procedure:
Answer:
1. Lock-out, tag-out
2. Close suction valve
3. Close discharge valve
,4. In order to vary the capacity of an absorption plant, you should regulate the...
Answer: Flow of the water to the condenser
5. 600,000 btu per hour equals how many tons of refrigeration?
A) 300
B) 3,000
C) 500
D) 50
Answer: D) 50
*Rationale: One ton of refrigeration equals 12,000 BTU per hour. Therefore,
600,000 ÷ 12,000 = 50 tons.*
6. Heat transfer takes place by:
A) evaporation, conduction and condensation
B) radiation, conduction and convection
C) condensation, evaporation and radiation
D) sublimation, evaporation and convection
Answer: B) radiation, conduction and convection
Rationale: These are the three primary methods of heat transfer in
thermodynamics.
7. Refrigerant recovery is defined as:
A) Removing the refrigerant from a system and storing it in an external container,
with the lowest emissions possible
B) Reprocessing a refrigerant into a new product that can be reused in another
system
C) The process of cleaning a refrigerant of dirt and contaminants
D) None of the above
Answer: A) Removing the refrigerant from a system and storing it in an external
container, with the lowest emissions possible
8. A 10-ton refrigeration unit has a capacity of:
A) 2,000 btu/minute
B) 12,000 btu/minute
,C) 20,000 btu/minute
D) 144,000 btu/day
Answer: A) 2,000 btu/minute
*Rationale: 1 ton = 12,000 BTU/hour = 200 BTU/minute. 10 tons × 200
BTU/minute = 2,000 BTU/minute.*
9. In an absorption system, the medium normally used to vaporize refrigerant
and increase its temperature is:
A) water
B) propane
C) ethylene
D) steam
Answer: D) steam
10. 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
Answer: D) frozen expansion valve
Rationale: Water in Freon systems can freeze at the expansion valve, causing
blockages.
11. The subcooling effect of the liquid refrigerant just before the expansion
valve causes increased:
A) horsepower
B) refrigeration effect
C) expansion valve capacity
D) refrigerant flow
Answer: B) refrigeration effect
12. 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
Answer: B) passes directly into the suction line
13. 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
Answer: B) a minimum of every 5 years
14. The minimum required rate discharge capacity of the pressure-relief device
or fusible plug for a refrigerant-containing vessel is determined by the formula C
= Fd1. What is "C" equal to?
A) btu/minute
B) Refrigerant pressure
C) Air in pounds/minute
D) Cubic feet/minute
Answer: C) Air in pounds/minute
15. 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
Answer: D) 1,000° F and above 400° F
16. 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
