ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Doors communicating with outside from a mechanical room must be?

  • Self-closing, aligned, fire door
  • Self-closing, wooden, fire door
  • Self-closing, approved, fire door
  • Steel, approved, weather-stripped

2: B3 refrigerants are considered

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

3: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

4: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Aluminum
  • Copper
  • Magnesium alloy

5: Single compound Refrigerants are classified by what two criteria?

  • Flammability and temperature range
  • Weight and color
  • Flammability and toxicity
  • Temperature range and hazardousness

6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's water
  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's cheap
  • Because it's a non-flammable refrigerant

7: Halo-carbon refrigerants cannot be used with what material?

  • Copper
  • Magnesium alloy
  • Aluminum
  • Stainless Steel

8: What is the refrigerant dichlorodifluoromethane?

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

9: 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”

10: What would be the classification for Stop & Shop grocery store?

  • Instituional
  • Place of assembly
  • Industrial
  • Large mercantile

11: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

12: When must refrigeration system covered by the code be inspected?

  • Not required
  • Annually and when installed
  • Upon installation
  • Annually

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

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

14: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

15: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • the owner shall be informed
  • gas masks must be worn
  • no flames shall be permitted
  • explosion precautions must be taken

16: Ammonia can come in contact with _______ ?

  • Copper tubing
  • Aluminum
  • Brass
  • Copper

17: 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

18: How far from the ground does a relief valve need to be?

  • At least 25' above grade
  • Not more than 3' above grade
  • At least 15' above grade
  • At least 20' above grade

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

  • 50
  • 10
  • 1
  • 100

20: 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

21: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

22: How many flammability classifications are refrigerants in?

  • 2
  • 5
  • 3
  • 7

23: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 5
  • 3
  • 2
  • 1

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

  • black iron
  • copper
  • magnesium
  • stainless steel

25: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above