ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall not be prohibited
  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • of Group B2 refrigerant shall be prohibited

2: An example of direct system is

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

3: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • commercial occupancy
  • illegal occupancy
  • public assembly occupancy
  • institutional occupancy

4: A declaration test is needed when the system contains more than

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

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

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

6: Can ammonia be used on domestic system?

  • yes
  • no
  • yes, for systems under 10 tons
  • no, unless there is proper ventilation system installed

7: Most CFC's are

  • flammable
  • inert
  • inert but toxic
  • toxic

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

  • A-1
  • B-1
  • B-2
  • A-2

9: 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.

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

10: 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

11: A restaurant is classified as a

  • commercial occupancy
  • mixed occupancy
  • large mercantile occupancy
  • public assembly occupancy

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

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

13: Doors communicating with outside from a mechanical room must be?

  • Self-closing, wooden, fire door
  • Self-closing, approved, fire door
  • Steel, approved, weather-stripped
  • Self-closing, aligned, fire door

14: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 10
  • 15
  • III
  • 25

15: Who approves containers for refrigerants?

  • E.P.A
  • D.O.E
  • D.O.T
  • D.O.D

16: Evaporators within 18" of a heating coil must be equipped with a

  • high limit control
  • pressure relief device
  • low limit control
  • zone valve

17: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • there is no Group B1 refrigerants
  • lower
  • the same
  • higher

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

  • Copper
  • Aluminum
  • Stainless Steel
  • Magnesium alloy

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

  • A-1
  • A-3
  • C-3
  • B-2

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

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

21: How much clearance do you need around the perimeter of electrical panels?

  • 24"
  • 12"
  • 18"
  • 36"

22: Ammonia belongs to Group

  • A-1
  • B-1
  • B-2
  • A-2

23: What refrigerant is an inorganic compound?

  • R-22
  • R-132A
  • Ammonia
  • R-410A

24: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 6.6 lbs
  • 13.9 lbs
  • 22 lbs
  • 44 lbs

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

  • B2
  • A3
  • C3
  • A2