Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: 14.7 psia is equivalent to

  • atmospheric pressure at seal level
  • 29.92" Hg
  • 0 psig
  • All of the above.

2: In a refrigeration system, you open a valve from the condenser and collect some material on a clean white sheet of bond paper, which of the following would you most likely be testing for?

  • checking the level of refrigerant in the system
  • testing for oil in the system
  • testing for moisture in the system
  • none of the above

3: A movie theater would be considered a

  • institutional occupancy
  • public assembly occupancy
  • mixed occupancy
  • commercial occupancy

4: A line voltage thermostat controls a 1,200 watt strip header at 120 volts. What must be minimum ampere rated of the stat be?

  • 20 amps
  • 10 amps
  • 15 amps
  • 5 amps

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

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

6: What refrigerant doesn't have to be classified?

  • R-134A
  • R-717
  • R-718
  • R-422A

7: A motor starter contains a thermal overload and a

  • 3-way relay
  • contactor
  • solenoid
  • transformer

8: Copper and its alloys shall not be used with ammonia

  • True
  • False

9: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

10: What is R-22?

  • CCFCM
  • HFC
  • Chlorodifluoromethane
  • Chlorofluoromethane

11: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • A group sensing
  • phosgene gas sening
  • CO Sensing
  • refrigerant sensing

12: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

13: A run capacitor is wired in series with the _____ windings.

  • run
  • common
  • start
  • start capacitor

14: When air is ducted through a machine room that services occupied space, What must be done?

  • Flanged and gasketed
  • Insulated and cross broke
  • Ducted and sealed
  • Welded and seamed.

15: One ton of refrigeration is defined as ______ btu/minute.

  • 60
  • 200
  • 720,000
  • 12,000

16: How many forces operate a thermostatic expansion valve?

  • 4
  • 1
  • 2
  • 3

17: Dew point is

  • the temperature of air of 50% RH
  • the temperature above which water vapor in the air will start to condense
  • the temperature below which water vapor in the air will start to condense
  • the temperature below which water vapor in the air will start to evaporate

18: In an air conditioning system, the unit of total heat energy content in an air/vapor mixture is

  • Sensible heat
  • Latent heat
  • Enthalpy
  • Specific heat

19: A 120 volt motor rated at 1,800 watts. You find the motor is drawings 25 amps. The motor is

  • drawing RLA and is running as it should
  • drawing LRA and is seized and should be replaced.
  • running hot
  • none of the above

20: 1 HP = ____ Watts?

  • 3,412
  • 746
  • 11,239
  • 3.1416

21: A device used to measure small pressure differences is the

  • anemometer
  • manometer
  • pyrometer
  • phsycometirc

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

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

23: R-123 belongs to Group

  • B-1
  • A-3
  • B-2
  • B-3

24: The reversing valve is commonly used

  • on commercial system that involve two different temperatures
  • on multiple compressor systems
  • on all heat pumps
  • when the code requires a check valve

25: If a purge unit fails on a low pressure chiller, what are the symptoms?

  • high head pressure
  • low suction pressure
  • increased capacity
  • low pressure chillers do not have purge units