ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Trichlorofluoromethane is the name of what refrigerant?

  • R-12
  • R-502
  • R-113
  • R-11

2: Ammonia is under what safety classification?

  • B2
  • B1
  • B3
  • A3

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

  • A-1
  • B-1
  • B-2
  • A-2

4: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 99%
  • 75%
  • 80%
  • 90%

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

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

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

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

7: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • tight fitting doors
  • self-closing doors
  • automatic ventilation

8: Can ammonia be used on domestic system?

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

9: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

10: 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

11: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

12: What section governs pressure vessels?

  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired
  • OSHA
  • Section ASHREA 34

13: Who authorizes changes to the safety codes?

  • Board of Boilers
  • Person in charge of the facility
  • Person who pulled the permit
  • Contractor who last serviced the system.

14: 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

15: 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

16: What section of ASHRAE-15 governs pressure vessels?

  • Section 7 ASHRAE-15 ASME VIII fired
  • OSHA
  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 6 ASHRAE-34 ASME VIII unfired

17: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper tubing
  • Copper
  • Brass

18: 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
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a pressure relief device

19: What does safe access mean?

  • Locked doors
  • OSHA approved
  • Well-lit exit signs
  • A clear unobstructed path to the equipment and controls

20: How many different groups of refrigerants are there?

  • 11
  • 3
  • 15
  • 7

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

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

22: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusible plug
  • relief plug
  • fusion plug
  • rupture plug

23: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system less than 1,000 lbs
  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used for mechanical equipment only

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

  • C3
  • B2
  • A2
  • A3

25: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above