ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Direct systems using Group II refrigerants

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

2: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

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

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

4: What does safe access mean?

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

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

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

6: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

7: Pressure relief valves shall be marked with the data from

  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code

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

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

9: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code
  • MSCA Code
  • the MACS Pressure Vessel Code of Massachusetts

10: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 5.5
  • 2.5
  • 2.0
  • 3.0

11: 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.

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

12: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Zinc
  • Magnesium
  • Aluminum

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

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

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

  • B2
  • A3
  • C3
  • A2

15: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

16: Can ammonia be used on domestic system?

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

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

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

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

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

19: Class 3 refrigerants are

  • non-toxic
  • highly flammable
  • toxic
  • non-flammable

20: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's water
  • Because it's a non-flammable refrigerant
  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant

21: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons

22: Ammonia (NH3) is a group III refrigerant

  • True
  • False

23: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

24: Name a CFC refrigerant(s):

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

25: How many different groups of refrigerants are there?

  • 11
  • 3
  • 15
  • 7