ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

3: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 40'
  • At least 30'
  • At least 20'

4: Which of the following is an inorganic refrigerant?

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

5: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • load-side of the contactor in
  • breaker panel in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in

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

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

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

  • 15
  • 10
  • 18
  • 24

8: Ammonia is under what safety classification?

  • A3
  • B1
  • B2
  • B3

9: Pressure vessels with an internal volume of 3 cubic feet or more

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

10: Can ammonia be used on domestic system?

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

11: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

12: 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.

  • 80
  • 90
  • 100
  • 110

13: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

14: A High-Probablity system

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

15: When a refrigeration or air conditioning system is installed

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

16: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 330
  • 110
  • 6.6
  • 1,000

17: R-11 belongs to Group

  • B-1
  • B-3
  • A-1
  • A-2

18: What would be the classification of a church?

  • Institutional
  • Industrial
  • Place of assembly
  • Large mercantile

19: The discharge relief valve is located (9.4.6)

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

20: A relief valve shall be located at least ___ above grade.

  • 15'
  • 25'
  • 36'
  • 10'

21: 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

22: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 3.0
  • 3.0, 3.5
  • 6.6, 6.6
  • 2.5, 2.5

23: Machinery rooms must be vented to ______?

  • unoccupied spaces
  • neutralizing tank
  • basement
  • outdoors

24: When air is ducted through a machine room that services occupied space, What must be done?

  • Ducted and sealed
  • Insulated and cross broke
  • Welded and seamed.
  • Flanged and gasketed

25: When should a relief valve start to function?

  • Two times it's working pressure
  • At it's set pressure
  • 10 psi before it's set pressure
  • Before the purge station discharges