Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Transformers are rated in

  • volts-ohms
  • volt-amps
  • amps
  • volts

2: A micron is

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

3: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Classifed
  • Leak checked
  • Certified
  • Insulated and installed in a pipe duct (Encased)

4: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-113
  • R-12
  • R-502

5: Booster compressors, pump refrigerant into the

  • receiver
  • high side of the secondary compressor
  • low side of the primary compressor
  • heat & plate heat exchanges

6: What pipe can not be used for refrigeration?

  • L
  • M
  • K
  • N

7: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

8: If a halide torch is used for leak detection, what color is the flame if it detects a leak?

  • orange
  • red
  • blue
  • green

9: What must be done if refrigeration lines pass through a concrete floor?

  • insulated
  • installed through a pipe casing
  • leak checked
  • moisture barrier

10: A motor starter is a device that includes an overload and a _______?

  • contactor
  • 2-pole contacts
  • duel-coil
  • all of the above

11: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • B-1
  • B-2
  • A-1

12: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 20'
  • At least 40'
  • There is no minimum for relief valve and windows.
  • At least 30'

13: What is the refrigerant dichlorodifluoromethane?

  • R-134A
  • R-123
  • R-22
  • R-12

14: A class B2 refrigerant is considered

  • non-toxic and highly flammable
  • toxic and somewhat flammable
  • toxic and non-flammable
  • non-toxic and non-flammable

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

  • watts
  • reactance
  • amperage
  • voltage

16: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • load-side of the contactor in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • breaker panel in

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

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

18: The best way to determine the voltage requirement for an electrical component is to

  • determine the capacity of the service panel
  • read the voltage with a mulitmeter
  • check with the utility company
  • read the nameplate data

19: The reversing valve is commonly used

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

20: A restaurant is classified as a

  • large mercantile occupancy
  • mixed occupancy
  • commercial occupancy
  • public assembly occupancy

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

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

22: Clearance volume

  • is the same on all compressors
  • has no effect on compressor capacity
  • varies depending on compressor speed
  • affects compressor capacity

23: A EPR valve is installed on what type of evaporators?

  • high-temperature evaporators
  • low-temperature evaporators
  • shell and tube evaporators
  • plate evaporators

24: Refrigerant restricted in 2004 but used for transition for decades:

  • R-123
  • R-22
  • R-11
  • R-134A

25: The most common type of motor starter is

  • across the line starter
  • part winding starter
  • duel-winding starter
  • delts-wye starter