ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What refrigerant doesn't have to be classifted?

  • R-717
  • R-718
  • R-711
  • R-134a

2: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusible plug
  • relief plug
  • fusion plug
  • rupture plug

3: When an inspection is needed, how often must it be done?

  • every 18 months
  • every 36 months
  • annually
  • every 24 months

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

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

5: A High-Probablity system

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is a system highly likely to leak from a failed connection or component of such system

6: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

7: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with RX-11
  • Flush with ammonia
  • Flush with R-718

8: What refrigerant doesn't have to be classified?

  • R-134A
  • R-422A
  • R-717
  • R-718

9: What is the refrigerant chlorodifluoromethane?

  • R-12
  • R-123
  • R-134a
  • R-22

10: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

11: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Stainless steel
  • Copper

12: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 660 lbs
  • 330 lbs
  • 500 lbs

13: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • phosgene gas sening
  • refrigerant sensing
  • A group sensing
  • CO Sensing

14: A restaurant is classified as a

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

15: Class 3 refrigerants are

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

16: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

17: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • does not require a pressure-limiting device
  • shall have a pressure limiting device installed on the high side of the system
  • shall have a pressure limiting device and a pressure relief valve installed
  • shall be inspected by the Boiler of Inspectors bi-annually

18: A class A3 refrigerant is considered

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

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

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

20: Dual-pressure relief devices should be installed on

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

21: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • No, never
  • Yes, always
  • Yes, Under certain condidtions

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

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

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

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

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

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

25: Who authorizes changes to the safety codes?

  • Person in charge of the facility
  • Contractor who last serviced the system.
  • Board of Boilers
  • Person who pulled the permit