ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 25'
  • 10'
  • 15'
  • 36'

2: 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.

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

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

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

4: Dual-pressure relief devices should be installed on

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

5: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

6: 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

7: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

8: What is Trichlorotrifluoromethane?

  • R-113
  • R-13
  • R-12
  • R-11

9: A relief valve discharge capacity is rated in

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

10: What is an egress?

  • An escape route
  • A code violation
  • A valve put on the low side of the system to prevent frosting
  • An entrance or exit

11: Relief valves are rated in

  • gallons of water per minute
  • gallons of water per hour
  • pounds of air per hour
  • pounds of air per minute

12: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • mixed occupancy
  • commercial occupancy
  • institutional occupancy
  • public assembly occupancy

13: What must be done if refrigeration lines pass through a concrete floor?

  • insulated
  • installed through a pipe casing
  • moisture barrier
  • leak checked

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

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

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

  • 100%
  • 75%
  • 80%
  • 90%

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

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

17: A Low-Probability System

  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space

18: 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

19: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • 72"
  • 6'
  • Ceiling height

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

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

21: 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

22: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 25
  • 22
  • 66
  • 50

23: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 75%
  • 80%
  • 90%
  • 100%

24: A class A3 refrigerant is considered

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

25: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-12
  • R-502
  • R-113