ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class A machinery room
  • Class T machinery room
  • Class M machinery room
  • Class B machinery room

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

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

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

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

4: 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

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

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

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

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

7: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-1
  • B-1
  • B-2
  • A-2

8: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • Yes, Under certain condidtions
  • No, never
  • Yes, always

9: What must be done if refrigeration lines pass through a concrete floor?

  • leak checked
  • insulated
  • moisture barrier
  • installed through a pipe casing

10: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • ammonia
  • HCFC-123
  • Lithium bromide
  • CFC-11

11: How many refrigerant classifications are there for flammability?

  • 3
  • 7
  • 1
  • 2

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.

  • 110
  • 90
  • 100
  • 80

13: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Nothing must be done
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line
  • Make sure its compatible, notify owner, and notify AHJ.

14: 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

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

15: What type of relief valve is used on a CO2 system?

  • glove disc
  • fusible plug
  • rupture disc
  • gate valve

16: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 15
  • 10
  • 25

17: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 66
  • 50
  • 25

18: NH3 is

  • lithium bromide
  • R-718
  • ammonia
  • R-508A

19: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

20: 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

21: 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

22: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

23: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • bi-annually
  • regularly
  • quarterly
  • annually

24: 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

25: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • Machinery rooms need not be vented
  • the mechanical room housing the refrigeration system
  • the return air ducted system
  • the outdoors