ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: When an inspection is needed, how often must it be done?

  • every 24 months
  • every 18 months
  • every 36 months
  • annually

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

  • A-3
  • C-3
  • B-2
  • A-1

4: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

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

6: 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
  • shall have a pressure limiting device and a pressure relief valve installed
  • does not require a pressure-limiting device

7: 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

8: 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, 3.0
  • 6.6, 6.6
  • 2.5, 2.5
  • 3.0, 3.5

9: 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.

  • 90
  • 100
  • 110
  • 80

10: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

11: A class B1 refrigerant is considered

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

12: What section governs pressure vessels?

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

13: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • business occupancy
  • mercantile occupancy
  • commercial occupancy
  • public assembly occupancy.

14: 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

15: Who authorizes changes to the safety codes?

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

16: Machinery rooms must be vented to ______?

  • basement
  • neutralizing tank
  • unoccupied spaces
  • outdoors

17: The certificate of inspection

  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be authorized by a notarized insurance company
  • shall be posted and protected from dirt, water, and other elements

18: Which refrigerant replaced R-12?

  • R-134A
  • R-22
  • R-410A
  • R-407A

19: A High-Probability System

  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

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

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

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

  • True
  • False

22: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or less
  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or less

23: R-410A is classified as a ____ refrigerant on the safety matrix.

  • B-1
  • A-1
  • B-2
  • A-2

24: The discharge relief valve is located

  • between the compressor and reciever
  • on top of the condensor
  • between the compressor and the stop valve
  • on the accumulator

25: When a refrigeration or air conditioning system is installed

  • the form of certificate shall be authorized by the Department of Pubic safety
  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • it shall not be operated below prescribed pressures