ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

2: Class A refrigerants are considered

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

3: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms

4: What is an egress?

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

5: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • the aggregate of the high side and low side
  • 2.5 times the design pressure
  • the low side

6: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 10
  • 18
  • 15
  • 24

7: 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
  • 1.5

8: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • HCFC-123
  • ammonia
  • CFC-11
  • Lithium bromide

9: A High-Probablity system

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is a system highly likely to leak from a failed connection or component of such system

10: What is a Category "M" fluid?

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

11: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Stainless steel
  • Copper

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

  • True
  • False

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

  • B-2
  • A-3
  • C-3
  • A-1

14: 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

15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 100%
  • 75%
  • 90%
  • 80%

16: 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

17: Halogen refrigerants are corrosive to which type of metal?

  • copper
  • magnesium
  • stainless steel
  • black iron

18: The color code of a tank of ammonia is

  • light green
  • silver
  • white
  • lavender

19: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • critical pressure
  • high pressure
  • design pressure
  • low pressure

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

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

21: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UM” and “UV”
  • “UV”
  • “U” or “UM”
  • “UL”

22: 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
  • 100
  • 250
  • 350

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

  • Copper
  • Aluminum
  • Magnesium
  • Zinc

24: What is the refrigerant dichlorodifluoromethane?

  • R-123
  • R-134A
  • R-12
  • R-22

25: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall not be prohibited