ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • Muffler
  • Stop valve
  • Foot valve
  • Moisture indicator

2: What is not a requirement of a class T machine room?

  • tight fitting doors
  • self-closing doors
  • automatic ventilation
  • fire hose connection to the building fire protection system

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

  • 100%
  • 80%
  • 90%
  • 75%

4: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Anyone, it's a completely safe area
  • Authorized persons only
  • Any employee

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

  • copper
  • black iron
  • magnesium
  • stainless steel

6: A restaurant is classified as a

  • public assembly occupancy
  • commercial occupancy
  • large mercantile occupancy
  • mixed occupancy

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

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

8: 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

9: Large mercantile occupancy is

  • 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 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

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

11: Ammonia can come in contact with _______ ?

  • Brass
  • Aluminum
  • Copper tubing
  • Copper

12: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 55
  • 50
  • 15
  • 75

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

  • C3
  • A2
  • A3
  • B2

14: What does safe access mean?

  • A clear unobstructed path to the equipment and controls
  • Locked doors
  • OSHA approved
  • Well-lit exit signs

15: Class 3 refrigerants are

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

16: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

17: A positive displacement compressor is

  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • is a reciprocating type compressor with 2 or more pistons
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber

18: Most CFC's are

  • inert but toxic
  • flammable
  • toxic
  • inert

19: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • mercantile occupancy
  • public assembly occupancy.
  • commercial occupancy
  • business occupancy

20: 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

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

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

22: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

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

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

24: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 50
  • 100
  • 350
  • 550

25: What must be done if refrigeration lines pass through a concrete floor?

  • moisture barrier
  • installed through a pipe casing
  • insulated
  • leak checked