ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A relief valve discharge capacity is rated in

  • PSIG
  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.
  • PSIA

2: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 10
  • 24
  • 15
  • 18

3: Class A refrigerants are considered

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

4: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

5: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Anyone, it's a completely safe area
  • Any employee
  • Authorized persons only

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

7: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

8: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 75
  • 55
  • 15
  • 50

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

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

10: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-12
  • R-11
  • R-113
  • R-22

11: Name three things that must be done when changing refrigeration lubricant?

  • Place sign, check for leaks, insulate
  • Nothing must be done
  • Make sure it's compatible, notify owner, notify AHJ
  • You can't change lubricants.

12: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When it's used as part of a supply or return air system
  • When there is a space 6' or more above it
  • When there are sprinklers above
  • When its white

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

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

14: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

15: A class A3 refrigerant is considered

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

16: What is R-22?

  • HFC
  • Chlorodifluoromethane
  • CCFCM
  • Chlorofluoromethane

17: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • B-1
  • B-2
  • A-1

18: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

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

  • True
  • False

20: What must be done to refrigerant pipes before being buried?

  • Encased
  • Leaked checked
  • Coated
  • Certified

21: A hotel is considered a _______ occupancy.

  • commercial
  • residential
  • institutional
  • mercantile

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

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

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

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

24: 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

25: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above