ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1
  • 2.2
  • 1.2
  • 1.5

2: Which refrigerant(s) is an HFC?

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

3: The Department that certifies the transportation of refrigerant is the

  • EPO
  • RSES
  • EPA
  • DOT

4: What type refrigerant is NOT ozone depleting?

  • Halon
  • CFC
  • HFC
  • HCFC

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

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

6: 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

7: What is the refrigerant dichlorodifluoromethane?

  • R-22
  • R-134A
  • R-123
  • R-12

8: A class B2 refrigerant is considered

  • non-toxic and non-flammable
  • toxic and somewhat flammable
  • toxic and non-flammable
  • non-toxic and highly flammable

9: Ammonia belongs to Group

  • B-2
  • A-1
  • B-1
  • A-2

10: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-113
  • R-12
  • R-11

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

  • Zinc
  • Magnesium
  • Aluminum
  • Copper

12: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall have a pressure limiting device installed on the high side of the system
  • shall be inspected by the Boiler of Inspectors bi-annually
  • does not require a pressure-limiting device
  • shall have a pressure limiting device and a pressure relief valve installed

13: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 1
  • 2
  • 3
  • 5

14: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 80%
  • 90%
  • 75%
  • 100%

16: Pipe identification labels are required when the system contains more than

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

17: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

18: 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, 2.5
  • 6.6, 6.6
  • 3.0, 3.5
  • 2.5, 3.0

19: 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

20: High pressure controls should be set no higher than

  • 10% of set point
  • 25% of set point
  • 90% of set point
  • 80% of set point

21: 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

22: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F

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

  • 15'
  • 36'
  • 25'
  • 10'

24: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 36
  • 24
  • 18
  • 48

25: The Board of Boilers adopts by reference

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