ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Copper
  • Stainless steel
  • Aluminum

2: A class B1 refrigerant is considered

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

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

  • RSES
  • DOT
  • EPA
  • EPO

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

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

5: A declaration test is needed when the system contains more than

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

6: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-11
  • R-113
  • R-12

7: Class T machine room

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

8: Which refrigerant class listed below is the most flammable?

  • A3
  • B2
  • A2
  • C3

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: 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

11: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices

12: 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
  • outside the machinery room
  • boiler
  • evaporator

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

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

14: 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”
  • “UL”
  • “UM” and “UV”

15: What pipe can not be used for refrigeration?

  • K
  • L
  • N
  • M

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

  • 80%
  • 90%
  • 100%
  • 75%

17: A class A3 refrigerant is considered

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

18: What is a Category "M" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • 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
  • Any fluid that exceeds 150 psig and has design temperatures over 366F

19: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

20: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

21: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.0
  • 2.5
  • 3.0
  • 5.5

22: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

23: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall be prohibited
  • of Group B2 refrigerant shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited

24: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

25: What do you need to do when you install a new system?

  • Insulate the suction line before you take a superheat reading
  • Add refrigerant
  • Document the superheat and subcooling reading
  • Have it inspected