ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

2: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Magnesium alloy
  • Copper
  • Aluminum

3: How much refrigerant can be stored in a mechanical room outside of the system?

  • 150
  • 100
  • 330
  • 200

4: What would be the classification of a church?

  • Institutional
  • Industrial
  • Place of assembly
  • Large mercantile

5: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

6: Stop valves shall not be permitted between the system and the

  • bleed valve
  • condenser
  • service valve
  • relief valve

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

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

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

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

9: How many groups of refrigerants are there?

  • 7
  • 5
  • 1
  • 3

10: What do you need to do when you install a new system?

  • Have it inspected
  • Add refrigerant
  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading

11: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

12: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the installing contractor
  • Approved by the authorized person

13: The Board of Boilers adopts by reference

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

14: All serviceable components of a refrigeration system shall be provided with

  • safe access
  • manufactures instructions on start-up procedures
  • service manuals
  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code

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

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

16: 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

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

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

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.

  • 3.0, 3.5
  • 6.6, 6.6
  • 2.5, 2.5
  • 2.5, 3.0

19: What is a Category "M" fluid?

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

20: What is a Category "D" fluid?

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

21: Class A refrigerants are considered

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

22: How many flammability classifications are refrigerants in?

  • 7
  • 2
  • 5
  • 3

23: How are refrigerant blends classified?

  • Based on the oil used
  • Blends don't have to be classified
  • Based on worst case fractionation
  • Based on best case Fractionation

24: When a refrigeration or air conditioning system is installed

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

25: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above