ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A restaurant is classified as a

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

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

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

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

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

4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-11
  • R-113
  • R-22
  • R-12

5: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • III
  • 25
  • 10
  • 15

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

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

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

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

8: Ammonia (NH3) is a group III refrigerant

  • True
  • False

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

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

10: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 700F
  • 800F
  • 600F
  • 1000F

11: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

12: A class B2 refrigerant is considered

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

13: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 3
  • 5
  • 1
  • 2

14: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

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

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

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: 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
  • 500 lbs
  • 330 lbs

18: Class T machine room

  • shall include closets used for setting equipment
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room

19: Halogenated refrigerants cannot be used with what material?

  • Aluminum
  • Copper
  • Stainless steel
  • Magnesium alloy

20: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a fusible plug
  • either a fusible plug or a pressure relief device
  • a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified

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

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

22: Can ammonia be used on domestic system?

  • no, unless there is proper ventilation system installed
  • yes
  • no
  • yes, for systems under 10 tons

23: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 15
  • 18
  • 10
  • 24

24: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 3/32"
  • 1/16"
  • 1/8"

25: 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

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