ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The discharge relief valve is located (9.4.6)

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

2: Fusible plugs must have what marked on them?

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

3: What type of pressure relief device is used on a CO2 system?

  • Glove valve
  • Rupture disk
  • Fusible plug
  • Gate valve

4: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • Machinery rooms need not be vented
  • the return air ducted system
  • the mechanical room housing the refrigeration system

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

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

6: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • business occupancy
  • public assembly occupancy.
  • mercantile occupancy
  • commercial occupancy

7: 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

8: All serviceable components of a refrigeration system shall be provided with

  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • manufactures instructions on start-up procedures
  • safe access
  • service manuals

9: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

10: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

11: Refrigeration piping before being buried shall be

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

12: 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

13: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • mixed occupancy
  • public assembly occupancy
  • commercial occupancy
  • institutional occupancy

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

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

15: What is Trichlorotrifluoromethane?

  • R-11
  • R-13
  • R-12
  • R-113

16: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

17: How many different groups of refrigerants are there?

  • 3
  • 15
  • 11
  • 7

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

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

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

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

20: 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.

  • 75
  • 55
  • 50
  • 15

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

  • Magnesium alloy
  • Copper
  • Stainless Steel
  • Aluminum

22: 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

23: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

24: A Low-Probability System

  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection will enter the occupied space

25: NH3 is

  • ammonia
  • lithium bromide
  • R-718
  • R-508A