Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: A hissing noise at the expansion valve is a good indication that

  • liquid is passing thru it
  • nothing is passing thru
  • expansion valve is oversized
  • gas is passing thru it

2: A movie theater would be considered a

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

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

  • Specific heat
  • Enthalpy
  • Latent heat
  • Sensible heat

4: When energized, a normally open relay will be

  • noisy
  • depends on the type and class of the relay
  • open
  • closed

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

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

6: A micron is

  • one millonths of a micrometer
  • one millonths of a centimeter
  • a larger unit of measurement than Hg
  • one thousandths of a millimeter

7: _____ and its alloys are suitable for use with ammonia systems.

  • Zinc
  • Copper
  • Magnesium
  • Aluminum

8: What does an anemometer measure?

  • voltage
  • velocity
  • temperature
  • amperage

9: When an electronic bridge is in balance the bridge output will be

  • 15 volts
  • 1 volt
  • 0 volts
  • .01 volts

10: The color code of a tank of ammonia is

  • light green
  • white
  • silver
  • lavender

11: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.5
  • 2.0
  • 3.0
  • 5.5

12: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • the return air ducted system
  • the mechanical room housing the refrigeration system
  • Machinery rooms need not be vented

13: On a pumpdown system, the liquid-line solenoid is controlled by the

  • low-ambient controller
  • low pressure switch
  • defrost timer
  • thermostat

14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 550 lbs
  • 330 lbs.
  • 55 lbs
  • 660 lbs

15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 75%
  • 100%
  • 90%
  • 80%

16: Which creates more of a heat load?

  • 90% RH
  • 70% RH
  • 50% RH
  • 30% RH

17: Heat is a form of

  • matter
  • energy
  • power
  • work

18: On a TXV, the purpose of an external equalizer is to?

  • compensate for a pressure drop across the evaporator coil
  • allow a greater adjustment spam
  • Increase the pressure on the top of the power head diaphragm
  • balance the evaporator load

19: All low-pressure chillers use which type of compressor?

  • Scroll
  • Reciprocating
  • Rotary
  • Centrifugal

20: 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

21: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • explosion precautions must be taken
  • the owner shall be informed
  • gas masks must be worn
  • no flames shall be permitted

22: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

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

  • vapor
  • low side
  • oil side
  • liquid

24: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?

  • 104 ohms
  • 80 ohms
  • 71 ohms
  • 27 ohms

25: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above