ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The Board of Boilers adopts by reference

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

2: Which refrigerant replaced R-12?

  • R-407A
  • R-134A
  • R-22
  • R-410A

3: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

4: Can ammonia be used on domestic system?

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

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

  • 12"
  • 18"
  • 36"
  • 24"

6: Large mercantile occupancy is

  • 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.
  • 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 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 1500 persons congregate on levels above or below street level to purchase personal merchandise

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

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

8: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the mechanical room housing the refrigeration system
  • the return air ducted system
  • the outdoors
  • Machinery rooms need not be vented

9: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and reciever
  • between the compressor and oil separator
  • between the compressor and the stop valve

10: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

11: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.

  • 400
  • 350
  • 100
  • 250

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

  • A-3
  • A-1
  • C-3
  • B-2

13: All electrical work done on refrigeration systems must comply with

  • NEC and Massachusetts Modifications
  • ASHREA-15 Section 9.2.1
  • Department of Energy
  • OSHA

14: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

15: What type refrigerant is NOT ozone depleting?

  • CFC
  • Halon
  • HCFC
  • HFC

16: A hotel is considered a _______ occupancy.

  • commercial
  • residential
  • institutional
  • mercantile

17: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

18: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1.5
  • 1.2
  • 1
  • 2.2

19: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

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

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

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

  • 66
  • 22
  • 25
  • 50

22: How many CFMs are required per square foot of commercial office occupied space

  • 20 CFM
  • 15 CFM
  • .5 CFM
  • 5 CFM

23: 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

24: What type of relief valve is used on a CO2 system?

  • fusible plug
  • glove disc
  • gate valve
  • rupture disc

25: 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.

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