ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: All electrical work done on refrigeration systems must comply with

  • ASHREA-15 Section 9.2.1
  • NEC and Massachusetts Modifications
  • OSHA
  • Department of Energy

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

  • Fire hose connected to the building fire protection system.
  • Self-closing doors
  • Tight fitting doors
  • Automatic ventilation

3: 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

4: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Aluminum
  • Zinc
  • Magnesium

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

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

6: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

7: 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

8: 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)

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

9: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

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

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

11: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

12: Relief valves are rated in

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

13: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

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

  • 90%
  • 100%
  • 75%
  • 80%

15: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

16: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

17: Direct systems using Group II refrigerants

  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.

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

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

19: R-11 belongs to Group

  • A-2
  • A-1
  • B-1
  • B-3

20: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

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

  • Leak tested
  • Pressurized
  • Insulated
  • Inspected

22: What does safe access mean?

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

23: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 90
  • 80
  • 100
  • 110

24: What is an example of institutional occupancy?

  • Hospital
  • Shopping mall
  • Dorms
  • Football stadium

25: 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
  • 15
  • 50
  • 75