ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: How many different groups of refrigerants are there?

  • 3
  • 7
  • 11
  • 15

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

  • Encased
  • Certified
  • Leaked checked
  • Coated

3: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

4: When should a relief valve start to function?

  • 10 psi before it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges
  • At it's set pressure

5: _____ and its alloys are suitable for use with ammonia systems.

  • Magnesium
  • Aluminum
  • Copper
  • Zinc

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

  • C3
  • A2
  • B2
  • A3

7: The color code of a tank of ammonia is

  • lavender
  • light green
  • silver
  • white

8: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

9: 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 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 or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise

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

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

11: 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

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

  • R-11
  • R-22
  • R-12
  • R-113

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

  • 75%
  • 100%
  • 90%
  • 80%

14: Pressure vessels with an internal volume of 3 cubic feet or less

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

15: Ammonia is under what safety classification?

  • B3
  • A3
  • B2
  • B1

16: When air is ducted through a machine room that services occupied space, What must be done?

  • Insulated and cross broke
  • Flanged and gasketed
  • Welded and seamed.
  • Ducted and sealed

17: The Board of Boilers adopts by reference

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

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

  • True
  • False

19: How many refrigerant classifications are there for flammability?

  • 3
  • 1
  • 7
  • 2

20: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 20'
  • At least 30'
  • There is no minimum for relief valve and windows.
  • At least 40'

21: What type refrigerant is NOT ozone depleting?

  • CFC
  • HCFC
  • HFC
  • Halon

22: R-22 falls under which safety classification?

  • A-1
  • B-2
  • A-2
  • B-1

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

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

24: Dual-pressure relief devices should be installed on

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

25: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper tubing
  • Brass
  • Copper