ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: R-717 is

  • water
  • ammonia
  • carbon dioxide
  • trichloromethane

2: Dual-pressure relief devices should be installed on

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

3: Pipe identification labels are required when the system contains more than

  • 110 lbs
  • 55 lbs
  • 120 lbs
  • 65 lbs

4: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

5: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • boiler
  • outside the machinery room
  • evaporator
  • compressor

6: 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

7: 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

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

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

9: What type of material can't be used on the outlet of a relief valve?

  • Copper
  • Magnesium alloy
  • Stainless steel
  • PVC

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

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

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

  • 2
  • 1
  • 3
  • 5

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

  • 110
  • 6.6
  • 330
  • 1,000

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

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

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

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

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

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

16: 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

17: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 6.6, 6.6
  • 2.5, 3.0
  • 3.0, 3.5
  • 2.5, 2.5

18: Where must a refrigeration contractor's license number be displayed?

  • Trucks, invoices, and advertising
  • Uniforms, checks, and invoices.
  • Truck, office, every job, and on all equipment
  • Trucks, license plates, and uniforms

19: How many different groups of refrigerants are there?

  • 7
  • 15
  • 11
  • 3

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

  • Copper
  • Magnesium alloy
  • Aluminum
  • Stainless Steel

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

  • Insulated
  • Inspected
  • Leak tested
  • Pressurized

22: 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

23: Liquid level gauges must be provided with what?

  • Automatic shut-offs
  • A relief valve
  • A low level mark
  • A red line

24: Indirect systems using Group II refrigerants

  • 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
  • shall be used for mechanical equipment only

25: What is R-22?

  • HFC
  • Chlorodifluoromethane
  • CCFCM
  • Chlorofluoromethane