Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: The evaporator is a device to

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

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

  • voltage
  • reactance
  • amperage
  • watts

3: What effect does the temperature of air have on humidity?

  • warmer air holds more moisture then cooler air
  • cooler air holds more moisture then warmer air
  • air has no effect of humidity
  • none of the above

4: Electricity involves the movement of electrons in atoms

  • True
  • False

5: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

6: What is the minimum size wire you can use on a 30 amp circuit?

  • 12 AWG
  • 14 AWG
  • 10 AWG
  • 16 AWG

7: What chemical in the refrigerant set off the leak detection alarm?

  • Fluorine
  • Chlorine
  • Both A and B
  • none of the above

8: A declaration test is needed when the system contains more than

  • 110 lbs
  • 65 lbs
  • 120 lbs
  • 55 lbs

9: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

10: An electrical circuit has a 208V power supply and draws 47 amps total, What would be the wattage of the circuit

  • 9.776 watts
  • 977.6 watts
  • 9,776 watts
  • .9776 watts

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

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

12: The absorber shell contains the

  • condenser and the generator
  • evaporator and the absorber
  • condenser and the absorber
  • condenser, the evaporator, and the generator

13: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

14: Low pressure systems have what kind of compressor?

  • Rotary
  • Reciprocating
  • Centrifugal
  • Scroll

15: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs

16: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 6.6
  • 330
  • 110
  • 1,000

17: On an air cooled condenser, if the ambient air is 35F and dropping, what's its effect to the condensor?

  • it would make the condenser more efficient
  • it would make the condenser less efficient
  • it would have no effect on the condenser
  • it would cause the condenser to sweat

18: An air conditioning system rated for 36,000 BTU's is equivalent to

  • 12,000 tons of cooling
  • two tons of cooling
  • three tons of cooling
  • one ton of cooling

19: Which of the following is NOT a positive displacement compressor?

  • centrifugal
  • scroll
  • screw
  • reciprocating

20: 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
  • compressor
  • evaporator
  • outside the machinery room

21: When an A/C system is excessively low on refrigerant

  • it can become contaminated with water
  • there can be nuisance trip outs
  • the suction line may be too hot to touch
  • All of the above

22: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code
  • MSCA Code
  • the MACS Pressure Vessel Code of Massachusetts

23: How are a compressor and condenser fan wired?

  • series
  • parallel-series
  • series-parallel
  • parallel

24: What is R-22?

  • CCFCM
  • Chlorofluoromethane
  • Chlorodifluoromethane
  • HFC

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

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