ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What kind of material can't be used on the outlet of a relief valve?

  • Aluminum
  • PVC
  • Stainless Steel
  • Copper

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

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

3: All serviceable components of a refrigeration system shall be provided with

  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • manufactures instructions on start-up procedures
  • safe access
  • service manuals

4: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

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

  • tight fitting doors
  • automatic ventilation
  • fire hose connection to the building fire protection system
  • self-closing doors

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

  • 80%
  • 90%
  • 75%
  • 100%

7: 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

8: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

9: Ammonia is under what safety classification?

  • B2
  • B1
  • B3
  • A3

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

  • Moisture indicator
  • Foot valve
  • Muffler
  • Stop valve

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

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

12: B3 refrigerants are considered

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

13: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

14: What type of relief valve is used on a CO2 system?

  • rupture disc
  • fusible plug
  • glove disc
  • gate valve

15: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper
  • Copper tubing
  • Brass

16: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Classifed
  • Certified
  • Insulated and installed in a pipe duct (Encased)
  • Leak checked

17: The discharge relief valve is located (9.4.6)

  • between the compressor and the stop valve
  • on top of the condensor
  • between the compressor and oil separator
  • between the compressor and reciever

18: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

19: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

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

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

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

22: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

23: What type of material can't be used on the outlet of a relief valve?

  • Stainless steel
  • PVC
  • Magnesium alloy
  • Copper

24: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 25
  • 10
  • 15
  • III

25: R-22 is considered a(n)

  • CFC
  • HFC
  • HCFC
  • HCFCH