Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Which refrigerant class listed below is the most flammable?

  • B2
  • A3
  • C3
  • A2

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

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

3: At higher altitudes, the boiling point of refrigerant is

  • equal to the coefficient of water at 32F
  • the same
  • lower
  • higher

4: Doors communicating with outside from a mechanical room must be?

  • Self-closing, wooden, fire door
  • Self-closing, approved, fire door
  • Steel, approved, weather-stripped
  • Self-closing, aligned, fire door

5: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • regularly
  • bi-annually
  • quarterly
  • annually

6: Class T machine room

  • shall include closets used for setting equipment
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor

7: A movie theater would be considered a

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

8: The low pressure oil safety switch

  • must be reset manually
  • never trips
  • resets itself automatically
  • resets itself after the time delay has terminated

9: Usually dry bulb temperature is

  • same as wet bulb temperature
  • higher than wet bulb temperature
  • lower than dry bulb temperature
  • not important and shall be ignored

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

  • True
  • False

11: The formula for Pure Power in a resistance circuit is

  • Kw = volts X amps
  • Watts X power factor
  • Watts = volts X amps
  • Watts X amps.

12: How many refrigerant classifications are there for toxicity?

  • 5
  • 2
  • 1
  • 3

13: What is specific heat?

  • measured heat
  • heat required to raise the temperature of 1lb of a substance 1 degree
  • the specific heat required to change the state of one cubic foot of air to steam
  • none of the above

14: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

15: How are refrigerant blends classified?

  • Based on the oil used
  • Based on worst case fractionation
  • Based on best case Fractionation
  • Blends don't have to be classified

16: The discharge relief valve is located (9.4.6)

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

17: "R" represents ___ in the Ohm's law formula

  • capacitance
  • amperage
  • resistance
  • voltage

18: One atmosphere equals

  • 14.7
  • 0 psig
  • 0 psia
  • 29.4

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

  • start capacitor
  • start
  • common
  • run

20: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 100
  • 350
  • 550
  • 50

21: The boiling point of a refrigerant is based on

  • Temperature
  • Heat content
  • a pressure-temperature relationship
  • None of the above.

22: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?

  • EEV
  • Solenoid valve
  • CPR valve
  • EPR valve

23: A chilled water pump suction gauge reads 10 psig. Discharge gauge reads 48 psig. The head in feet of the pump is working against

  • 116
  • 108
  • 88
  • 38

24: A capacitor in series with the start windings will do what?

  • Nothing
  • Decrease the RLA to within 10% of its rating
  • Increase starting torque
  • Increase run efficiency by 10% of its rating

25: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • self-closing doors
  • tight fitting doors
  • automatic ventilation