ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 5
  • 3
  • 1
  • 2

2: Pipe identification labels are required when the system contains more than

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

3: B3 refrigerants are considered

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

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

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

5: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 100
  • 350
  • 50

6: What does safe access mean?

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

7: What happens after your initial inspection of a pressure vessel?

  • There is a temporary shut-down until a final inspection can be performed.
  • Notify the Fire Marshal that the system has been inspected and approved
  • Notify the AHJ to let them know that the system been inspected
  • Inspector leaves a metal tag with a certification listed on it

8: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 20'
  • At least 30'
  • At least 40'

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

  • Coated
  • Encased
  • Leaked checked
  • Certified

10: 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

11: R-123 belongs to Group

  • B-1
  • B-3
  • A-3
  • B-2

12: What is R-22?

  • CCFCM
  • HFC
  • Chlorofluoromethane
  • Chlorodifluoromethane

13: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 110
  • 100
  • 90
  • 80

14: High pressure controls should be set no higher than

  • 10% of set point
  • 80% of set point
  • 90% of set point
  • 25% of set point

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

  • True
  • False

16: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 1000F
  • 700F
  • 800F
  • 600F

17: NH3 is

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

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

  • True
  • False

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

  • a fusible plug
  • a pressure relief device
  • 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

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

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

21: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-22
  • R-12
  • R-113
  • R-11

22: Can ammonia be used on domestic system?

  • yes
  • no
  • yes, for systems under 10 tons
  • no, unless there is proper ventilation system installed

23: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there are sprinklers above
  • When there is a space 6' or more above it
  • When its white
  • When it's used as part of a supply or return air system

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

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

25: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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