ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • lower
  • there is no Group B1 refrigerants
  • higher
  • the same

2: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 7.25'
  • 9.00'
  • 8'4"
  • 7.00'

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

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

4: 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

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

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

6: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

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

  • 24"
  • 18"
  • 12"
  • 36"

8: What refrigerant were phased out in 2004?

  • R-12
  • R-134a
  • R-22
  • R-11

9: What refrigerant is an inorganic compound?

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

10: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

11: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • commercial occupancy
  • public assembly occupancy.
  • business occupancy
  • mercantile occupancy

12: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 75%
  • 100%
  • 90%
  • 80%

13: All electrical work done on refrigeration systems must comply with

  • Department of Energy
  • ASHREA-15 Section 9.2.1
  • NEC and Massachusetts Modifications
  • OSHA

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

15: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • competent welder
  • licensed welder
  • welder qualified
  • licensed technician

16: 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

17: What is an example of institutional occupancy?

  • Football stadium
  • Hospital
  • Shopping mall
  • Dorms

18: A class A3 refrigerant is considered

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

19: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Certified
  • Insulated and installed in a pipe duct (Encased)
  • Leak checked
  • Classifed

20: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 13.9 lbs
  • 44 lbs
  • 6.6 lbs
  • 22 lbs

21: What would be the classification of a church?

  • Place of assembly
  • Large mercantile
  • Institutional
  • Industrial

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

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

23: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

24: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • high limit control
  • zone valve
  • pressure relief device

25: What is the refrigerant chlorodifluoromethane?

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