ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: How many groups of refrigerants are there?

  • 7
  • 3
  • 5
  • 1

2: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • load-side of the contactor in
  • breaker panel in
  • first disconnect in

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

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

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

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

5: 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

6: 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
  • 50
  • 350
  • 100

7: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Copper
  • Stainless steel

8: What refrigerant were phased out in 2004?

  • R-11
  • R-12
  • R-22
  • R-134a

9: Fusible plugs shall not be used with pressure vessels of

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

10: Pressure vessels with an internal volume of 3 cubic feet or less

  • do not need pressure relief protection
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs
  • shall use pressure relief devices

11: How far from the ground does a relief valve need to be?

  • At least 15' above grade
  • At least 25' above grade
  • At least 20' above grade
  • Not more than 3' above grade

12: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

13: Stop valves shall not be permitted between the system and the

  • bleed valve
  • relief valve
  • service valve
  • condenser

14: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

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

  • A3
  • A2
  • B2
  • C3

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

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

17: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

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

  • 15'
  • 36'
  • 10'
  • 25'

19: Relief valves are rated in

  • gallons of water per hour
  • gallons of water per minute
  • pounds of air per minute
  • pounds of air per hour

20: What is Trichlorotrifluoromethane?

  • R-12
  • R-11
  • R-113
  • R-13

21: Each machinery room shall contain

  • high and low pressure controls
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

22: A restaurant is classified as a

  • mixed occupancy
  • public assembly occupancy
  • large mercantile occupancy
  • commercial occupancy

23: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use pressure relief devices or fusible plugs
  • shall use pressure relief devices
  • shall use fusible plugs

24: When a refrigeration or air conditioning system is installed

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

25: 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)

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