ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • commercial occupancy
  • mixed occupancy
  • institutional occupancy
  • public assembly occupancy

3: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Automatic ventilation
  • Tight fitting doors
  • Self-closing doors

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

  • A3
  • B2
  • A2
  • C3

5: The Department that certifies the transportation of refrigerant is the

  • DOT
  • EPO
  • RSES
  • EPA

6: Can ammonia be used on domestic system?

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

7: Which refrigerant replaced R-12?

  • R-22
  • R-407A
  • R-410A
  • R-134A

8: Direct systems using Group II refrigerants

  • shall be installed in Class T machinery rooms
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be allowed to be used for human comfort.

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

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

10: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

11: What is Trichlorotrifluoromethane?

  • R-11
  • R-113
  • R-13
  • R-12

12: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

13: Doors communicating with outside from a mechanical room must be?

  • Steel, approved, weather-stripped
  • Self-closing, approved, fire door
  • Self-closing, aligned, fire door
  • Self-closing, wooden, fire door

14: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

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

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

16: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 90
  • 100
  • 80
  • 110

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

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

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

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

19: What is the refrigerant dichlorodifluoromethane?

  • R-22
  • R-134A
  • R-12
  • R-123

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

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

21: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • high side of the system
  • low side of the system
  • the liquid side of the system
  • the vapor side of the system

22: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and the stop valve
  • between the compressor and oil separator
  • between the compressor and reciever

23: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

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

  • 800F
  • 1000F
  • 600F
  • 700F

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

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