Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: In an air conditioning plant which an indirect low side, water is used inside of bring: the proper sequence of operating the plan is

  • start the comrpessor
  • start the fan and circulating pump
  • reset the expansion valve
  • reset the safety valve

2: The generator shell contains the

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

3: When the compressor is below the condensor

  • traps are needed on the discharge line
  • traps are needed on the oil return line
  • traps are needed on the suction line
  • traps are not needed on this type of system

4: Can ammonia be used on domestic system?

  • no
  • yes
  • no, unless there is proper ventilation system installed
  • yes, for systems under 10 tons

5: Which is the lowest vacuum?

  • 1,000 Microns
  • 5 psig
  • 5" hg
  • 10 psia

6: What would be the classification for Stop & Shop grocery store?

  • Large mercantile
  • Industrial
  • Place of assembly
  • Instituional

7: What kind of material can't be used on the outlet of a relief valve?

  • Stainless Steel
  • Copper
  • PVC
  • Aluminum

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

  • green
  • orange
  • blue
  • red

9: The leaving chilled water set point for comfort cooling is typically?

  • 60
  • 38
  • 45
  • 66

10: NH3 is

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

11: Who authorizes changes to the safety codes?

  • Person who pulled the permit
  • Contractor who last serviced the system.
  • Board of Boilers
  • Person in charge of the facility

12: A hotel is considered a _______ occupancy.

  • commercial
  • mercantile
  • institutional
  • residential

13: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

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

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

15: High side floats are used on centrifugal chiller systems are are considered critically charged systems.

  • are obsolete.
  • False
  • depends on the type of refrigerant being used
  • True

16: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 15
  • 10
  • 18
  • 24

17: Pressure vessels with an internal volume of 3 cubic feet or more

  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs
  • do not need pressure relief protection
  • shall use pressure relief devices

18: The normal operating evaporator temperature of R-410A for air conditioning is typically

  • 158F
  • 32F
  • 155F
  • 45F

19: Liquid refrigerant flashing, or turning to vapor, in the liquid line may be due to

  • liquid line that is too small
  • shortage of refrigerant
  • liquid line that had too high vertical lift
  • All of the above

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

  • EPR valve
  • CPR valve
  • EEV
  • Solenoid valve

21: How many refrigerant classifications are there for toxicity?

  • 2
  • 1
  • 3
  • 5

22: Transformers are rated in

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

23: Which of the following is not an air velocity meter?

  • Anemometer
  • Hydrometer
  • Anemotherm
  • Velometer

24: The equivalent length of pipe in a water piping system is

  • the total length of pipe plus equivalent-length of fittings
  • the total length of pipe as you would measure it plus 25% for fittigns
  • the total length of pipe as you would measure it
  • the total length of pipe plus equivalent of fittings multiplied by 2.31

25: 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