ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

2: A restaurant is classified as a

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

3: Can ammonia be used on domestic system?

  • no
  • yes, for systems under 10 tons
  • no, unless there is proper ventilation system installed
  • yes

4: Relief valves are rated in

  • pounds of air per minute
  • gallons of water per minute
  • gallons of water per hour
  • pounds of air per hour

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

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

6: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

7: High pressure controls should be set no higher than

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

8: 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

9: 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
  • 250
  • 100
  • 400

10: A High-Probability System

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

11: R-22 falls under which safety classification?

  • B-2
  • B-1
  • A-1
  • A-2

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

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

13: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

14: Joints in refrigeration piping must be _____ before being covered?

  • Inspected
  • Leak tested
  • Insulated
  • Pressurized

15: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a fusible plug
  • either a fusible plug or a pressure relief device
  • a pressure relief device

16: A class B2 refrigerant is considered

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

17: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the evaporator
  • on a conspicuous card located near the compressor
  • inside the room, immediately adjacent to each door
  • outside the room, immediately adjacent to each door

18: 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
  • 100,000
  • 10,000

19: 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”

20: How many refrigerant classifications are there for flammability?

  • 3
  • 1
  • 2
  • 7

21: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the liquid side of the system
  • high side of the system
  • the vapor side of the system
  • low side of the system

22: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • Machinery rooms need not be vented
  • the return air ducted system
  • the mechanical room housing the refrigeration system
  • the outdoors

23: 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.

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

24: R-123 belongs to Group

  • B-2
  • B-3
  • B-1
  • A-3

25: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False