ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What type of pressure relief device is used on a CO2 system?

  • Gate valve
  • Fusible plug
  • Glove valve
  • Rupture disk

2: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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

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

  • condenser
  • service valve
  • bleed valve
  • relief valve

4: Relief valves are rated in

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

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

  • III
  • 15
  • 10
  • 25

6: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

7: What pipe can not be used for refrigeration?

  • N
  • K
  • M
  • L

8: Name three things that must be done when changing refrigeration lubricant?

  • Make sure it's compatible, notify owner, notify AHJ
  • Place sign, check for leaks, insulate
  • Nothing must be done
  • You can't change lubricants.

9: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Copper
  • Aluminum
  • Magnesium alloy

10: Most CFC's are

  • toxic
  • inert but toxic
  • flammable
  • inert

11: Trichlorofluoromethane is the name of what refrigerant?

  • R-12
  • R-113
  • R-502
  • R-11

12: What must be done to refrigerant pipes before being buried?

  • Encased
  • Leaked checked
  • Coated
  • Certified

13: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

14: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

15: A class B2 refrigerant is considered

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

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

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

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

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

18: When a refrigeration or air conditioning system is installed

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

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

  • 600F
  • 800F
  • 1000F
  • 700F

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

  • 10
  • 18
  • 15
  • 24

21: A class A3 refrigerant is considered

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

22: 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

23: Each machinery room shall contain

  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • 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

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

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

25: Refrigeration piping before being buried shall be

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