ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

2: Where a refrigeration or air conditioning system is installed,

  • the form or certificate shall be authorized by the Department of Public Safety
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • A field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressuers

3: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 2.2
  • 1
  • 1.5
  • 1.2

4: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 100,000
  • 100
  • 1,000
  • 10,000

5: What pipe can not be used for refrigeration?

  • L
  • N
  • K
  • M

6: How much clearance do you need around the perimeter of electrical panels?

  • 12"
  • 36"
  • 24"
  • 18"

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

  • 75%
  • 80%
  • 90%
  • 100%

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

  • 2.5
  • 5.5
  • 3.0
  • 2.0

9: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

10: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

11: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • MSCA Code

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

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

13: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 18
  • 50
  • 33

14: 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 fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content

15: 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

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

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

17: What does safe access mean?

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

18: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

19: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • gas masks must be worn
  • the owner shall be informed
  • explosion precautions must be taken
  • no flames shall be permitted

20: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

21: 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 low side
  • the high side

22: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

23: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class A machinery room
  • Class T machinery room
  • Class M machinery room
  • Class B machinery room

24: The gauge thickness required on a CO2 tank construction is

  • 1/8"
  • 5/16"
  • 3/32"
  • 1/16"

25: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above