ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

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

  • shall have a pressure limiting device and a pressure relief valve installed
  • 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

4: 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

5: What is a Category "M" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump systems

6: A professional or office building would be considered what type of occupancy?

  • commercial
  • public assembly
  • mercantile
  • business

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

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

8: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 75%
  • 80%
  • 100%
  • 90%

9: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

10: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type L
  • Type N
  • Type K

11: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

12: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • the return air ducted system
  • the mechanical room housing the refrigeration system
  • Machinery rooms need not be vented

13: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

14: Ammonia can come in contact with _______ ?

  • Brass
  • Aluminum
  • Copper tubing
  • Copper

15: R-717 is

  • carbon dioxide
  • trichloromethane
  • ammonia
  • water

16: How many refrigerant classifications are there for flammability?

  • 3
  • 2
  • 7
  • 1

17: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within

  • 1 week
  • 30 days
  • 2 months
  • 14 days

18: 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

19: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.

20: The Board of Boilers adopts by reference

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

21: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or less
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or more
  • vessels of 3 cubic feet or less

22: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • boiler
  • outside the machinery room
  • compressor
  • evaporator

23: What refrigerant doesn't have to be classified?

  • R-717
  • R-422A
  • R-134A
  • R-718

24: What does safe access mean?

  • A clear unobstructed path to the equipment and controls
  • Locked doors
  • OSHA approved
  • Well-lit exit signs

25: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 50
  • 15
  • 20
  • 75