Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 5
  • 2
  • 1
  • 3

2: The main purpose of the accumulator is to

  • provide space for vapor to accumulate
  • store liquid refrigerant
  • provide space for the accumulation of oil and containminants
  • prevent liquid slugs at the compressor

3: Booster compressors connect to the ____ side of the compressor

  • low side
  • oil side
  • vapor
  • liquid

4: What would be the classification of a church?

  • Industrial
  • Place of assembly
  • Institutional
  • Large mercantile

5: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Moisture indicator
  • Stop valve
  • Muffler

6: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

7: The first step in mechanical refrigeration is

  • expansion
  • compression
  • evaporation
  • condensation

8: "I" represents _______ in the Watt's law formula.

  • amperage
  • voltage
  • reactance
  • watts

9: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?

  • 144 BTU
  • 24,000 BTU
  • 970 BTU
  • 12,000 BTU

10: If a low-pressure chiller has a low-side leak, which of the following will most likely result?

  • High head pressure and low suction pressure
  • High suction pressure and high discharge pressure.
  • Low head pressure and high suction pressure
  • Low suction pressure and low discharge pressure

11: How many opening forces operate a thermostatic expansion valve?

  • 4
  • 2
  • 3
  • 1

12: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and the stop valve
  • between the compressor and oil separator
  • between the compressor and reciever

13: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 100
  • 90
  • 80
  • 110

14: On a day with low relative humidity, the two thermometers on a sling psychrometer will read

  • far apart or greater difference
  • 2F difference
  • nearly the same
  • a ling psychrometer doesn't have two theremometers.

15: A Lithium-bromide system is an absorption system that

  • uses water as a absorbent and lithium bromide as a refrigerant
  • uses water as a refrigerant and lithium bromide as an absorbent
  • uses salts as an absorbent and lithium bromide as a refrigerant
  • uses ammonia as a refrigerant and lithium bromide as an absorbent

16: What would be the classification of a prison?

  • Institutional
  • Industrial
  • Place of assembly
  • Large mercantile

17: A cross charged power element on an expansion valve would normally be used in what temperature range?

  • -40F to 0F
  • 0F-38F
  • -100F to -40F
  • 30F to 50F

18: R-11 belongs to Group

  • A-2
  • B-1
  • B-3
  • A-1

19: Suction line oil traps should be installed when the condenser is

  • in the basement and the evaporator is on the third floor
  • more than 100' away from the evaporator
  • on the third floor roof and the evaporator is in the basement
  • located outside the operates in temperatures below 35F

20: How many forces operate a thermostatic expansion valve?

  • 4
  • 1
  • 2
  • 3

21: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Circuit Breaker
  • Relief valve
  • Temperature limiter device
  • T&P device

22: The evaporator is a device to

  • remove heat from the refrigeration system
  • Keep the compressor busy
  • absorb heat into the refrigeration system
  • store liquid refrigerant

23: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • boiler
  • evaporator
  • outside the machinery room
  • compressor

24: How many BTU's is produced by one watt of energy

  • 1
  • 2.57
  • 3.41
  • 3.00

25: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's cheap
  • Because it's water
  • Because it's a non-flammable refrigerant