ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Pressure vessels with an internal volume of 3 cubic feet or less

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

2: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressures
  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall be approved by the owner for proper operation.

3: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

4: 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'
  • 9.00'
  • 8'4"
  • 7.25'

5: Indirect systems using Group II refrigerants

  • 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
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room

6: 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

7: 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

8: What does safe access mean?

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

9: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

10: Can ammonia be used on domestic system?

  • yes, for systems under 10 tons
  • no
  • yes
  • no, unless there is proper ventilation system installed

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

  • 2.0
  • 2.5
  • 3.0
  • 5.5

12: 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

13: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection and a rupture disc
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection as well as a temperature protection device
  • over pressure protection

14: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • you can't change refrigerants
  • make sure it's compatible, notify owner, notify A.H.J
  • nothing must be done
  • place sign, check for leaks, insulate

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

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

16: Relief valves are rated in

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

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

  • 150
  • 330
  • 100
  • 200

18: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

19: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 90%
  • 75%
  • 80%
  • 99%

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

  • True
  • False

21: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

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

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

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

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

24: Class A refrigerants are considered

  • flammable
  • toxic
  • non-toxic
  • non-flammable

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