ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Evaporators within 18" of a heating coil must be equipped with a

  • zone valve
  • low limit control
  • pressure relief device
  • high limit control

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

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

3: R-123 belongs to Group

  • B-1
  • B-2
  • A-3
  • B-3

4: Each machinery room shall contain

  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

5: Class A refrigerants are considered

  • non-flammable
  • toxic
  • non-toxic
  • flammable

6: What would be the classification of a prison?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Institutional

7: Most CFC's are

  • inert but toxic
  • toxic
  • flammable
  • inert

8: 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

9: A movie theater would be considered a

  • mixed occupancy
  • institutional occupancy
  • commercial occupancy
  • public assembly occupancy

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

  • Coated
  • Encased
  • Certified
  • Leaked checked

11: 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.

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

12: A positive displacement compressor is

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

13: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • Yes, always
  • Yes, Under certain condidtions
  • No, never

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

  • DOT
  • EPO
  • EPA
  • RSES

15: The gauge thickness required on a CO2 tank construction is

  • 1/8"
  • 5/16"
  • 1/16"
  • 3/32"

16: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “U” or “UM”
  • “UV”
  • “UM” and “UV”
  • “UL”

17: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

18: Class T machine room

  • shall have remote controls to stop the action of the refrigerant compressor
  • has no flame producing apparatus permanently installed
  • shall include closets used for setting equipment
  • shall have refrigerant leak detecting systems installed inside and outside the room

19: What does safe access mean?

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

20: 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
  • outside the machinery room
  • boiler

21: B3 refrigerants are considered

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

22: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • the same
  • higher
  • lower
  • there is no Group B1 refrigerants

23: The Board of Boilers adopts by reference

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

24: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 24
  • 48
  • 36
  • 18

25: R-410A is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • B-1
  • A-1
  • B-2