ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • of Group B2 refrigerant shall be prohibited
  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited

2: Pressure relief valves shall be marked with the data from

  • Section IV Division of the ASME Boiler & Pressure Code
  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code

3: Relief valves are rated in

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

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

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

5: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • CFC-11
  • ammonia
  • Lithium bromide
  • HCFC-123

6: The Board of Boilers adopts by reference

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

7: The discharge relief valve is located (9.4.6)

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

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

  • 24"
  • 18"
  • 12"
  • 36"

9: Each machinery room shall contain

  • 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
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate

10: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

11: How many different groups of refrigerants are there?

  • 11
  • 7
  • 15
  • 3

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

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

13: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

14: 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

15: Which occupancy can ammonia be used in?

  • commercial
  • depends on the quantity of freon
  • redifential
  • industrial

16: Class T machine room

  • shall include closets used for setting equipment
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room

17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 660 lbs
  • 500 lbs
  • 55 lbs
  • 330 lbs

18: When should a relief valve start to function?

  • At it's set pressure
  • 10 psi before it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges

19: Refrigeration piping before being buried shall be

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

20: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 20'
  • At least 30'
  • At least 40'

21: 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

22: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • design pressure
  • critical pressure
  • high pressure
  • low pressure

23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • rupture plug
  • fusion plug
  • relief plug
  • fusible plug

24: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

25: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-12
  • R-113
  • R-502