Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

2: A restaurant is classified as a

  • large mercantile occupancy
  • public assembly occupancy
  • commercial occupancy
  • mixed occupancy

3: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-12
  • R-11
  • R-113

4: The density of a gas refers to

  • cubic feet per pound
  • pounds per square foot
  • pounds per cubic foot
  • pounds per absolute pressure

5: An azeotropic refrigerant is

  • a mixture of two or more refrigerants that boil at about the same temperature minimizing temperature glide.
  • a mixture of two or more refrigerants that boil at much different temperatures causing temperature glide
  • a mixture of two or more refrigerants that boil at much different temperatures minimizing temperature glide
  • none of the above

6: Ammonia vaporization takes place at what temperature?

  • -110F
  • -460F
  • -28F
  • -32F

7: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 90%
  • 99%
  • 80%
  • 75%

8: Which is the lowest vacuum?

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

9: _____ and its alloys are suitable for use with ammonia systems.

  • Zinc
  • Copper
  • Magnesium
  • Aluminum

10: If the power element on an expansion valve should lose its charge, the valve would

  • Stay open
  • Close
  • Over feed
  • Under feed

11: Color is important in oil because

  • can tell us something about the refining of oil
  • it indicates the viscoisty.
  • it makes sight glasses easy to read
  • allows you to see into crankcase

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

  • 10
  • 24
  • 15
  • 18

13: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • illegal occupancy
  • public assembly occupancy
  • commercial occupancy
  • institutional occupancy

14: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • ammonia
  • CFC-11
  • Lithium bromide
  • HCFC-123

15: The Board of Boilers adopts by reference

  • the 1997 ANSI/ASHRAE Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • MSCA Code
  • Montreal Protocol Safety Code

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

  • 55 lbs
  • 500 lbs
  • 660 lbs
  • 330 lbs

17: A High-Probablity system

  • is a system highly likely to leak from a failed connection or component of such system
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from failed connections will enter the occupied space

18: If air is present in an absorption chilled water appliance, which of the following will most likely occur?

  • Rust can form
  • The Li-Br solution will become more concentrated
  • The Li-Br solution will become more diluted
  • System operating pressure will drop

19: 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

20: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • public assembly occupancy.
  • business occupancy
  • mercantile occupancy
  • commercial occupancy

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

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

22: Which of the following is an example of an azeotropic refrigerant?

  • R-134A
  • R-404A
  • R-410A
  • R-500

23: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

24: one BTU equals

  • 3.41 hp
  • 31.4 hp
  • 12,000 hp
  • Pi

25: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Circuit Breaker
  • Relief valve
  • T&P device
  • Temperature limiter device