ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • B-1
  • A-2
  • A-1

2: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

3: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or less
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or more
  • vessels of 3 cubic feet or less

4: What pipe can not be used for refrigeration?

  • L
  • K
  • N
  • M

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

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

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

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

  • A2
  • A3
  • B2
  • C3

8: A Low-Probability System

  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • 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 a failed connection will enter the occupied space

9: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 90%
  • 75%
  • 80%
  • 100%

10: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

11: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

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

  • 100%
  • 80%
  • 75%
  • 90%

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

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

14: Indirect systems using Group II refrigerants

  • shall be used for mechanical equipment only
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall be used in refrigeration system less than 1,000 lbs

15: R-11 belongs to Group

  • A-2
  • B-1
  • B-3
  • A-1

16: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 330
  • 1,000
  • 6.6
  • 110

17: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 50
  • 66
  • 22
  • 25

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

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

19: Ammonia belongs to Group

  • B-2
  • A-2
  • A-1
  • B-1

20: Relief valves are rated in

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

21: How much refrigerant can be stored in a mechanical room outside of the system?

  • 200
  • 100
  • 330
  • 150

22: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

23: 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

24: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use fusible plugs
  • shall use pressure relief devices
  • shall use pressure relief devices or fusible plugs

25: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 7.00'
  • 7.25'
  • 9.00'
  • 8'4"