ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 10,000
  • 100,000
  • 100
  • 1,000

2: How are refrigerant blends classified?

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

3: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

4: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

5: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 100
  • 50
  • 350
  • 550

6: What refrigerant doesn't have to be classifted?

  • R-717
  • R-711
  • R-134a
  • R-718

7: How far from the ground does a relief valve need to be?

  • At least 20' above grade
  • Not more than 3' above grade
  • At least 15' above grade
  • At least 25' above grade

8: Who authorizes changes to the safety codes?

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

9: 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 pressure relief devices
  • shall use rupture discs or duel pressure relief valves

10: Large mercantile occupancy is

  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.

11: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class T machinery room
  • Class M machinery room
  • Class B machinery room
  • Class A machinery room

12: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.5
  • 3.0
  • 5.5
  • 2.0

13: How many groups of refrigerants are there?

  • 7
  • 5
  • 3
  • 1

14: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

15: R-123 belongs to Group

  • A-3
  • B-3
  • B-1
  • B-2

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

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

17: How many refrigerant classifications are there for toxicity?

  • 5
  • 2
  • 1
  • 3

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

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

19: R-11 belongs to Group

  • B-1
  • A-2
  • B-3
  • A-1

20: Class 3 refrigerants are

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

21: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 48
  • 18
  • 24
  • 36

22: 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 pressure relief devices
  • shall use fusible plugs

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

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

24: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 80%
  • 99%
  • 75%
  • 90%

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