ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: What do you need to do when you install a new system?

  • Add refrigerant
  • Insulate the suction line before you take a superheat reading
  • Document the superheat and subcooling reading
  • Have it inspected

3: What kind of material can't be used on the outlet of a relief valve?

  • PVC
  • Stainless Steel
  • Copper
  • Aluminum

4: What refrigerant doesn't have to be classified?

  • R-718
  • R-422A
  • R-717
  • R-134A

5: Class T machine room

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

6: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Muffler
  • Stop valve
  • Moisture indicator

7: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

8: 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

9: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

10: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

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

  • Leaked checked
  • Coated
  • Certified
  • Encased

12: High pressure controls should be set no higher than

  • 80% of set point
  • 90% of set point
  • 10% of set point
  • 25% of set point

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

  • 36"
  • 12"
  • 18"
  • 24"

14: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A typical refrigerant used on newer air conditioning and heat pump ssytems

15: B3 refrigerants are considered

  • non-toxic but non-flammable
  • non-toxic but flammable
  • toxic and highly flammable
  • toxic but non-flammable

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

  • 2.2
  • 1.2
  • 1.5
  • 1

17: Pipe identification labels are required when the system contains more than

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

18: 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.

  • 350
  • 400
  • 250
  • 100

19: How many groups of refrigerants are there?

  • 7
  • 5
  • 1
  • 3

20: What happens after your initial inspection of a pressure vessel?

  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected

21: Ammonia belongs to Group

  • A-1
  • B-2
  • B-1
  • A-2

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

  • 5
  • 20
  • 15
  • 1

23: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • does not require a pressure-limiting device
  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device installed on the high side of the system
  • shall have a pressure limiting device and a pressure relief valve installed

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

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

25: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above