ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What is the refrigerant dichlorodifluoromethane?

  • R-123
  • R-22
  • R-12
  • R-134A

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

  • B-2
  • B-1
  • A-2
  • A-1

3: Trichlorofluoromethane is the name of what refrigerant?

  • R-113
  • R-502
  • R-12
  • R-11

4: Which occupancy can ammonia be used in?

  • industrial
  • depends on the quantity of freon
  • commercial
  • redifential

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

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

6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's a non-flammable refrigerant
  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's water

7: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

8: 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

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

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

10: Ammonia belongs to Group

  • B-2
  • A-2
  • A-1
  • B-1

11: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type N
  • Type L
  • Type K

12: What does safe access mean?

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

13: The certificate of inspection

  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be posted and protected from dirt, water, and other elements
  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be authorized by a notarized insurance company

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

  • commercial
  • business
  • public assembly
  • mercantile

15: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

16: 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

17: Refrigerant restricted in 2004 but used for transition for decades:

  • R-134A
  • R-22
  • R-123
  • R-11

18: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class M machinery room
  • Class T machinery room
  • Class A machinery room
  • Class B machinery room

19: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

20: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems

21: Dual-pressure relief devices should be installed on

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

22: 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

23: 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”

24: How much clearance do you need around the perimeter of electrical panels?

  • 24"
  • 36"
  • 18"
  • 12"

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

  • aluminum
  • zinc
  • magnesium
  • all of the above