ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: 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

3: Which refrigerant(s) is an HFC?

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

4: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Muffler
  • Moisture indicator
  • Stop valve

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

  • shall have a pressure limiting device installed on the high side of the system
  • shall be inspected by the Boiler of Inspectors bi-annually
  • does not require a pressure-limiting device
  • shall have a pressure limiting device and a pressure relief valve installed

6: Ammonia is under what safety classification?

  • B1
  • B3
  • A3
  • B2

7: A High-Probablity system

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

8: How far from the ground does a relief valve need to be?

  • At least 25' above grade
  • At least 20' above grade
  • Not more than 3' above grade
  • At least 15' above grade

9: 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

10: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

11: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the authorized person

12: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

13: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

14: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

15: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UR
  • UL and UM
  • UV or UR
  • UM or UL

16: 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

  • compressor
  • evaporator
  • boiler
  • outside the machinery room

17: What must be done to refrigerant pipes before being buried?

  • Certified
  • Encased
  • Coated
  • Leaked checked

18: Ammonia belongs to Group

  • A-1
  • B-1
  • A-2
  • B-2

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

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

20: When air is ducted through a machine room that services occupied space, What must be done?

  • Ducted and sealed
  • Welded and seamed.
  • Flanged and gasketed
  • Insulated and cross broke

21: A hotel is considered a _______ occupancy.

  • residential
  • institutional
  • commercial
  • mercantile

22: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • the low side
  • 2.5 times the design pressure
  • the aggregate of the high side and low side

23: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

24: What is Trichlorotrifluoromethane?

  • R-12
  • R-13
  • R-113
  • R-11

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

  • 5
  • 2
  • 1
  • 3