Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Where can 50/50 solder be used on?

  • suction line
  • liquid line
  • discharge line
  • none of the above

2: How many opening forces operate a thermostatic expansion valve?

  • 2
  • 3
  • 1
  • 4

3: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

4: Watt's Law indicates Volts X Amps = _________.

  • Ohms
  • Current
  • Watts
  • Resistance

5: Usually dry bulb temperature is

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

6: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 15
  • III
  • 25
  • 10

7: The high side float assembly meters refrigerant into the evaporator through the

  • lower chamber of the high side
  • upper chamber of the high side
  • upper chamber of the low side
  • lower chamber of the low side

8: The actual expansion curve of compression follows most nearly which one of the following curves?

  • Volume Temperature
  • Pressure Temperature
  • Isothermal
  • Adiabatic

9: Can you use Ammonia in industrial applications?

  • Yes, always
  • Yes, Under certain condidtions
  • When mixed with R-718
  • No, never

10: What is Trichlorotrifluoromethane?

  • R-13
  • R-11
  • R-113
  • R-12

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

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

12: A device used to measure small pressure differences is the

  • manometer
  • anemometer
  • phsycometirc
  • pyrometer

13: Electricity involves the movement of electrons in atoms

  • True
  • False

14: An accumulator can be located between the

  • compressor and condenser
  • condenser and evaporator
  • first stage and second stage compressors
  • evaporator and compressor

15: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

16: The start winding has _____ turns than the run winding.

  • more
  • less
  • the same
  • none of the above

17: What is the purpose of a surge capacitor on a contactor?

  • to balance the sine waves
  • to keep the contactor pulled in
  • to protect low voltage equipment
  • to provide smoother start/stops

18: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 50
  • 66
  • 25

19: The rupture disc on a low-pressure chiller typically releases pressure at

  • 15 psig
  • 5 psig
  • 10 psig
  • 0 psig

20: Booster compressors, pump refrigerant into the

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

21: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 18
  • 50
  • 33

22: Low pressure systems have what kind of compressor?

  • Scroll
  • Reciprocating
  • Rotary
  • Centrifugal

23: Ammonia (NH3) is a group III refrigerant

  • True
  • False

24: How many refrigerant classifications are there for toxicity?

  • 2
  • 1
  • 3
  • 5

25: What type of copper is not permitted on refrigeration systems?

  • Type N
  • Type K
  • Type L
  • Type M