ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Leak checked
  • Classifed
  • Certified
  • Insulated and installed in a pipe duct (Encased)

3: Can ammonia be used on domestic system?

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

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

  • 330 lbs.
  • 550 lbs
  • 55 lbs
  • 660 lbs

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

  • 800F
  • 700F
  • 1000F
  • 600F

6: 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

7: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • no flames shall be permitted
  • explosion precautions must be taken
  • gas masks must be worn
  • the owner shall be informed

8: 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

9: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

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

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

11: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

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

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

13: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

14: Single compound Refrigerants are classified by what two criteria?

  • Temperature range and hazardousness
  • Flammability and temperature range
  • Flammability and toxicity
  • Weight and color

15: A movie theater would be considered a

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

16: How many gallons of water per pound of ammonia do you need?

  • 5
  • 15
  • 20
  • 1

17: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

18: B3 refrigerants are considered

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

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

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

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

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

21: Direct systems using Group II refrigerants

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

22: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices or fusible plugs

23: How many gallons of water do you need per pound of ammonia?

  • 1
  • 100
  • 50
  • 10

24: What does safe access mean?

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

25: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • commercial occupancy
  • public assembly occupancy
  • illegal occupancy
  • institutional occupancy