ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Ammonia belongs to Group

  • A-2
  • B-2
  • B-1
  • A-1

2: What refrigerant is an inorganic compound?

  • R-22
  • R-410A
  • R-132A
  • Ammonia

3: Ammonia (NH3) is a group III refrigerant

  • True
  • False

4: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

  • 25'
  • 10'
  • 36'
  • 15'

7: When a refrigeration or air conditioning system is installed

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

8: 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
  • Lithium bromide
  • CFC-11

9: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-1
  • A-2
  • B-2
  • A-1

10: 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
  • commercial occupancy
  • illegal occupancy
  • institutional occupancy

11: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 90%
  • 80%
  • 99%
  • 75%

12: 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”
  • “UV”
  • “U” or “UM”
  • “UM” and “UV”

13: 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

14: A professional or office building would be considered what type of occupancy?

  • business
  • mercantile
  • commercial
  • public assembly

15: How many gallons of water do you need per pound of ammonia?

  • 1
  • 50
  • 10
  • 100

16: Dual-pressure relief devices should be installed on

  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or less
  • vessels of 3 cubic feet or less
  • vessels of 10 cubic feet or more

17: B3 refrigerants are considered

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

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

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

19: Single compound Refrigerants are classified by what two criteria?

  • Weight and color
  • Flammability and temperature range
  • Temperature range and hazardousness
  • Flammability and toxicity

20: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

21: 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

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

  • Certified
  • Coated
  • Leaked checked
  • Encased

23: Name three things that must be done when changing refrigeration lubricant?

  • Place sign, check for leaks, insulate
  • You can't change lubricants.
  • Nothing must be done
  • Make sure it's compatible, notify owner, notify AHJ

24: How many CFMs are required per square foot of commercial office occupied space

  • 20 CFM
  • 5 CFM
  • 15 CFM
  • .5 CFM

25: 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