Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: "I" represents ____ in the Ohm's law formula.

  • voltage.
  • resistance
  • amperage
  • capacitance

2: Pipe identification labels are required when the system contains more than

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

3: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UM” and “UV”
  • “U” or “UM”
  • “UV”
  • “UL”

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

  • manometer
  • phsycometirc
  • anemometer
  • pyrometer

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

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

6: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

7: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there is a space 6' or more above it
  • When there are sprinklers above
  • When its white
  • When it's used as part of a supply or return air system

8: The color code of a tank of ammonia is

  • lavender
  • silver
  • white
  • light green

9: Capacitors are rated in

  • volt - amperes
  • megaohms
  • micro-farads
  • kelvins

10: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • low side of the system
  • the liquid side of the system
  • the vapor side of the system
  • high side of the system

11: What device measures the specific gravity of a substance?

  • Hygrometer
  • Thermometer
  • Hydrometer
  • Manometer

12: Heat transferred by conduction from one body to another is done

  • via radiation
  • via liquids
  • via solids
  • via heat rays

13: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?

  • 3/8"
  • 1/2"
  • 3/4"
  • 5/8"

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

  • C-3
  • A-1
  • B-2
  • A-3

15: On cooling towers, what causes the condenser water to drop

  • ambient temperatures
  • tower fans
  • sensible heat
  • evaporation of the water droplets

16: Heat transferred by conduction from one body to another is done via:

  • gas
  • liquid
  • solid
  • All of the above

17: 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

18: R-410A is classified as a ____ refrigerant on the safety matrix.

  • A-1
  • B-1
  • B-2
  • A-2

19: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • phosgene gas sening
  • A group sensing
  • CO Sensing
  • refrigerant sensing

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

  • 10
  • III
  • 25
  • 15

21: Booster compressors connect to the ____ side of the compressor

  • low side
  • oil side
  • vapor
  • liquid

22: A class A3 refrigerant is considered

  • toxic and non-flammable
  • non-toxic and non-flammable
  • toxic and somewhat flammable
  • non-toxic but highly flammable

23: What is R-22?

  • CCFCM
  • HFC
  • Chlorodifluoromethane
  • Chlorofluoromethane

24: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device installed on the high side of the system
  • does not require a pressure-limiting device
  • shall have a pressure limiting device and a pressure relief valve installed

25: 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