ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 110
  • 100
  • 80
  • 90

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

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

4: The color code of a tank of ammonia is

  • silver
  • white
  • lavender
  • light green

5: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 3.0
  • 3.0, 3.5
  • 2.5, 2.5
  • 6.6, 6.6

6: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

7: What would be the classification of a prison?

  • Large mercantile
  • Industrial
  • Place of assembly
  • Institutional

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

  • Leak tested
  • Inspected
  • Pressurized
  • Insulated

9: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a pressure relief device
  • a fusible plug
  • either a fusible plug or a pressure relief device

10: Which refrigerant replaced R-12?

  • R-407A
  • R-134A
  • R-410A
  • R-22

11: Ammonia is under what safety classification?

  • B2
  • B3
  • A3
  • B1

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

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

13: 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

14: 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

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

  • 18
  • 50
  • 22
  • 33

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

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

17: Name three things that must be done when changing refrigeration lubricant?

  • Place sign, check for leaks, insulate
  • Make sure it's compatible, notify owner, notify AHJ
  • Nothing must be done
  • You can't change lubricants.

18: What refrigerant doesn't have to be classifted?

  • R-718
  • R-134a
  • R-717
  • R-711

19: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Rupture disk
  • Gate valve
  • Glove valve

20: Liquid level gauges must be provided with what?

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

21: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • first disconnect in
  • load-side of the contactor in
  • breaker panel in
  • 24 volt secondary side of the Class 2 transformer to the thermostat

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

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

23: 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

24: What must be done if refrigeration lines pass through a concrete floor?

  • moisture barrier
  • installed through a pipe casing
  • leak checked
  • insulated

25: B3 refrigerants are considered

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