ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Class T machine room

  • shall include closets used for setting equipment
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor

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

  • 24"
  • 12"
  • 18"
  • 36"

3: How many gallons of water do you need per pound of ammonia?

  • 1
  • 100
  • 50
  • 10

4: R-11 belongs to Group

  • B-1
  • B-3
  • A-1
  • A-2

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

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

6: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line

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

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

8: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • relief plug
  • rupture plug
  • fusion plug
  • fusible plug

9: Indirect systems using Group II refrigerants

  • shall be used for mechanical equipment only
  • shall be used in refrigeration system less than 1,000 lbs
  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room

10: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • No, never
  • Yes, always
  • Yes, Under certain condidtions

11: Machinery rooms must be vented to ______?

  • unoccupied spaces
  • neutralizing tank
  • basement
  • outdoors

12: What is an egress?

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

13: 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

14: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 50
  • 18
  • 33
  • 22

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

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

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

  • 99%
  • 80%
  • 75%
  • 90%

17: An example of direct system is

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

18: Large mercantile occupancy is

  • 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.
  • 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.

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

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

20: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

21: A class B2 refrigerant is considered

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

22: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

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

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

24: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 50
  • 20
  • 15
  • 75

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

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