ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A positive displacement compressor is

  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber

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

  • 100%
  • 75%
  • 80%
  • 90%

3: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

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

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

5: What is not a requirement of a Class T machine room?

  • Self-closing doors
  • Fire hose connected to the building fire protection system.
  • Tight fitting doors
  • Automatic ventilation

6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's water
  • Because it's a non-flammable refrigerant
  • Because it's cheap

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

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

8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • design pressure
  • low pressure
  • critical pressure
  • high pressure

9: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

10: The Department that certifies the transportation of refrigerant is the

  • RSES
  • EPA
  • EPO
  • DOT

11: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 20'
  • At least 40'
  • There is no minimum for relief valve and windows.
  • At least 30'

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

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

13: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper
  • Copper tubing
  • Brass

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

  • 330 lbs.
  • 660 lbs
  • 55 lbs
  • 550 lbs

15: 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

16: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 3
  • 2
  • 1
  • 5

17: Where a refrigeration or air conditioning system is installed,

  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • it shall not be operated below prescribed pressuers
  • A field inspection shall be made before it is put into service
  • the form or certificate shall be authorized by the Department of Public Safety

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

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

19: The Board of Boilers adopts by reference

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

20: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

21: R-717 is

  • water
  • trichloromethane
  • carbon dioxide
  • ammonia

22: 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 evaporator
  • on a conspicuous card located near the compressor

23: 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

24: Large mercantile occupancy is

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

25: R-22 falls under which safety classification?

  • A-1
  • A-2
  • B-1
  • B-2