ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Fusible plugs shall not be used with pressure vessels of

  • 3 cubic feet or less
  • 15 cubic feet or more
  • 15 square feet or less
  • 3 cubic feet or more

2: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper
  • Brass
  • Copper tubing

3: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

4: How much clearance do you need around the perimeter of electrical panels?

  • 36"
  • 18"
  • 24"
  • 12"

5: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 75%
  • 80%
  • 90%
  • 100%

6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

7: Can you use Ammonia in industrial applications?

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

8: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 6.6 lbs
  • 13.9 lbs
  • 44 lbs

9: The gauge thickness required on a CO2 tank construction is

  • 1/16"
  • 3/32"
  • 1/8"
  • 5/16"

10: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

11: What section governs pressure vessels?

  • Section 1 ASHREA 15 ASME fired
  • Section ASHREA 34
  • Section 8 ASHREA 15 ASME unfired
  • OSHA

12: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 36
  • 18
  • 48
  • 24

13: Joints in refrigeration piping must be _____ before being covered?

  • Leak tested
  • Pressurized
  • Inspected
  • Insulated

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

  • A-2
  • B-2
  • B-1
  • A-1

16: Ammonia belongs to Group

  • A-2
  • B-2
  • B-1
  • A-1

17: A restaurant is classified as a

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

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

  • 99%
  • 90%
  • 80%
  • 75%

19: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

20: Class 3 refrigerants are

  • highly flammable
  • non-toxic
  • non-flammable
  • toxic

21: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

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

  • 18
  • 50
  • 22
  • 33

23: R-11 belongs to Group

  • B-3
  • A-1
  • A-2
  • B-1

24: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

25: Who approves containers for refrigerants?

  • E.P.A
  • D.O.E
  • D.O.T
  • D.O.D