ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

2: A relief valve shall be located at least ___ above grade.

  • 10'
  • 25'
  • 15'
  • 36'

3: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1
  • 1.5
  • 1.2
  • 2.2

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

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

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

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

6: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

7: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UR
  • UL and UM
  • UM or UL
  • UV or UR

8: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • you can never change refrigerants
  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.
  • Place sign, check for leaks, and insulate suction line

9: NH3 is

  • R-718
  • lithium bromide
  • R-508A
  • ammonia

10: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the vapor side of the system
  • high side of the system
  • the liquid side of the system
  • low side of the system

11: What is the refrigerant chlorodifluoromethane?

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

12: R-22 falls under which safety classification?

  • B-1
  • A-1
  • B-2
  • A-2

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

  • DOT
  • RSES
  • EPO
  • EPA

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

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

15: 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

16: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • high pressure
  • low pressure
  • design pressure
  • critical pressure

17: Direct systems using Group II refrigerants

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

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

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

19: 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
  • boiler
  • outside the machinery room

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

  • A2
  • A3
  • B2
  • C3

21: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • public assembly occupancy
  • illegal occupancy
  • commercial occupancy
  • institutional occupancy

22: What is R-22?

  • Chlorodifluoromethane
  • HFC
  • Chlorofluoromethane
  • CCFCM

23: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

24: 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

25: All electrical work done on refrigeration systems must comply with

  • ASHREA-15 Section 9.2.1
  • Department of Energy
  • OSHA
  • NEC and Massachusetts Modifications