Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Ammonia systems use ____ pressure to adjust oil pressure

  • liquid
  • air
  • discharge
  • stream

2: The low pressure oil safety switch

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

3: A start capacitor in series with a start winding will

  • increase the amp draw of the motor
  • increase running efficiency
  • decrease the amp draw of the motor
  • increase starting torque

4: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Stainless steel
  • Copper

5: In an A/C unit, dirty filters will cause

  • high discharge pressure
  • high suction pressur
  • low suction pressure
  • low oil pressure

6: The certificate of inspection

  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be authorized by a notarized insurance company
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be posted and protected from dirt, water, and other elements

7: What would be the classification of a prison?

  • Institutional
  • Place of assembly
  • Industrial
  • Large mercantile

8: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are

  • sight glass, weight, pressure, and frost line
  • Buss-eye, weight, pressure, and frost line
  • sight glass, weight, pressure, and dipstick
  • sight glass, weight, paper method, and frost line.

9: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

10: The oil separator is always inserted in the system

  • where it can be easily serviced
  • in the discharge line
  • in a cool spot
  • to prevent oil logging

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

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

12: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?

  • 746 watts
  • 600 watts
  • 1000 watts
  • 5KW

13: A halide torch is most useful with a freon compression system

  • to detect refrigeration leaks in piping joints
  • to release a sticking valve
  • to remove from from TXV's and evaporator coils
  • to sweat flanges on the refrigeration piping

14: What refrigerant were phased out in 2004?

  • R-134a
  • R-22
  • R-12
  • R-11

15: NH3 is

  • R-718
  • R-508A
  • ammonia
  • lithium bromide

16: In an electrical circuit, what is potential measured in?

  • Amps
  • Ohms
  • Volts
  • Herys

17: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 6.6, 6.6
  • 2.5, 3.0
  • 3.0, 3.5
  • 2.5, 2.5

18: A split-phase motor has a ______ winding and a ____ winding

  • run, start
  • run, common
  • duel-run, duel-start
  • start, common

19: The critical temperature of a refrigerant gas occurs when

  • any increase in pressure will not liquefy the gas
  • the gas returns to a liquid
  • the gas is no longer saturated
  • any decrease in pressure will cause condensation

20: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

21: A pressure relief should be located at least _______ from windows and doors.

  • 30'
  • 20'
  • 25'
  • 15'

22: A mixed occupancy occurs when two or more occupancies are located with the same building

  • true
  • false

23: Heat is a form of

  • power
  • work
  • matter
  • energy

24: Where is the high-side float located on a chiller system?

  • inside the chiller barrel
  • discharge line
  • liquid line
  • flash line

25: Liquid level gauges must be provided with what?

  • Automatic shut-offs
  • A low level mark
  • A red line
  • A relief valve