ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: High pressure controls should be set no higher than

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

2: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

3: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Circuit Breaker
  • T&P device
  • Relief valve
  • Temperature limiter device

4: A relief valve shall be located at least ___ above grade.

  • 10'
  • 15'
  • 25'
  • 36'

5: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

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

7: How many flammability classifications are refrigerants in?

  • 3
  • 5
  • 7
  • 2

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

  • 1,000
  • 110
  • 330
  • 6.6

9: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • institutional occupancy
  • commercial occupancy
  • illegal occupancy
  • public assembly occupancy

10: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs
  • shall use rupture discs or duel pressure relief valves

11: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

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

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

13: 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.

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

14: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 5.5
  • 3.0
  • 2.0
  • 2.5

15: 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
  • the low side
  • the high side
  • 2.5 times the design pressure

16: The color code of a tank of ammonia is

  • lavender
  • light green
  • silver
  • white

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

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

18: What is a Category "M" fluid?

  • 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 toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • 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

19: A relief valve discharge capacity is rated in

  • PSIA
  • PSIG
  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.

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

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

21: The discharge relief valve is located (9.4.6)

  • between the compressor and reciever
  • between the compressor and the stop valve
  • on top of the condensor
  • between the compressor and oil separator

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

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

23: 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

24: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type N
  • Type L
  • Type K

25: Fusible plugs shall not be used with pressure vessels of

  • 15 cubic feet or more
  • 3 cubic feet or less
  • 3 cubic feet or more
  • 15 square feet or less