ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 80%
  • 100%
  • 90%
  • 75%

2: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

3: 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

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

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

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

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

6: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber

7: 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

  • boiler
  • outside the machinery room
  • evaporator
  • compressor

8: Pressure vessels with an internal volume of 3 cubic feet or less

  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs
  • shall use pressure relief devices
  • do not need pressure relief protection

9: What is Trichlorotrifluoromethane?

  • R-12
  • R-113
  • R-13
  • R-11

10: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 66
  • 25
  • 50

11: 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

12: 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

13: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

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

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

15: Who is permitted to access a refrigeration machine room?

  • Anyone, it's a completely safe area
  • Authorized persons only
  • Any employee
  • Contractors only

16: What is the refrigerant chlorodifluoromethane?

  • R-134a
  • R-12
  • R-22
  • R-123

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

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

18: Class T machine room

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

19: 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.

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

20: A class B1 refrigerant is considered

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

21: What is R-290’s ASHRAE safety code?

  • B1
  • B2
  • A2
  • A3

22: Direct systems using Group II refrigerants

  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.
  • shall not be used for air condition for human comfort

23: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • licensed welder
  • competent welder
  • welder qualified
  • licensed technician

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

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

25: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • ammonia
  • HCFC-123
  • CFC-11
  • Lithium bromide