ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the authorized person

3: R-410A is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • B-1
  • A-2
  • A-1

4: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • no flames shall be permitted
  • gas masks must be worn
  • the owner shall be informed
  • explosion precautions must be taken

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

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

6: What is R-22?

  • CCFCM
  • HFC
  • Chlorofluoromethane
  • Chlorodifluoromethane

7: Can ammonia be used on domestic system?

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

8: Class A refrigerants are considered

  • non-toxic
  • non-flammable
  • toxic
  • flammable

9: What would be the classification of a prison?

  • Large mercantile
  • Place of assembly
  • Industrial
  • Institutional

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: Fusible plugs shall not be used with pressure vessels of

  • 3 cubic feet or less
  • 15 square feet or less
  • 3 cubic feet or more
  • 15 cubic feet or more

12: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

13: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • quarterly
  • regularly
  • bi-annually
  • annually

14: 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

15: What type refrigerant is NOT ozone depleting?

  • HCFC
  • CFC
  • Halon
  • HFC

16: What pipe can not be used for refrigeration?

  • K
  • L
  • N
  • M

17: 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
  • 90
  • 100
  • 80

18: 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
  • a fusible plug
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified

19: When a refrigeration or air conditioning system is installed

  • it shall be approved by the owner for proper operation.
  • it shall not be operated below prescribed pressures
  • a field inspection shall be made before it is put into service
  • the form of certificate shall be authorized by the Department of Pubic safety

20: B3 refrigerants are considered

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

21: Doors communicating with outside from a mechanical room must be?

  • Self-closing, approved, fire door
  • Steel, approved, weather-stripped
  • Self-closing, wooden, fire door
  • Self-closing, aligned, fire door

22: A class B1 refrigerant is considered

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

23: Trichlorofluoromethane is the name of what refrigerant?

  • R-113
  • R-11
  • R-502
  • R-12

24: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • 2.5 times the design pressure
  • the aggregate of the high side and low side
  • the high side
  • the low side

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

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