ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • A-3
  • B-2
  • A-1
  • C-3

2: Most CFC's are

  • inert but toxic
  • toxic
  • flammable
  • inert

3: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

4: What is not a requirement of a class T machine room?

  • self-closing doors
  • fire hose connection to the building fire protection system
  • automatic ventilation
  • tight fitting doors

5: A declaration test is needed when the system contains more than

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

6: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

7: What type of relief valve is used on a CO2 system?

  • gate valve
  • rupture disc
  • fusible plug
  • glove disc

8: Liquid level gauges must be provided with what?

  • A red line
  • A low level mark
  • Automatic shut-offs
  • A relief valve

9: Single compound Refrigerants are classified by what two criteria?

  • Flammability and toxicity
  • Flammability and temperature range
  • Weight and color
  • Temperature range and hazardousness

10: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • shall be installed in Class T machinery rooms
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ

11: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Stainless steel
  • Copper

12: B3 refrigerants are considered

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

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

  • 18
  • 15
  • 10
  • 24

14: Pressure vessels with an internal volume of 3 cubic feet or less

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

15: Ammonia is under what safety classification?

  • B3
  • A3
  • B2
  • B1

16: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • inside the room, immediately adjacent to each door
  • outside the room, immediately adjacent to each door
  • on a conspicuous card located near the compressor
  • on a conspicuous card located near the evaporator

17: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

18: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

19: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-1
  • A-1
  • B-2
  • A-2

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

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

21: A relief valve discharge capacity is rated in

  • PSIA
  • PSIG
  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.

22: 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

23: R-11 belongs to Group

  • B-3
  • B-1
  • A-2
  • A-1

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

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

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

  • 75%
  • 100%
  • 90%
  • 80%