ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Can you use Ammonia in industrial applications?

  • Yes, always
  • When mixed with R-718
  • Yes, Under certain condidtions
  • No, never

2: A declaration test is needed when the system contains more than

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

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: What do you need to do when you install a new system?

  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading
  • Have it inspected
  • Add refrigerant

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

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

6: 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

7: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

8: What kind of material can't be used on the outlet of a relief valve?

  • Stainless Steel
  • Aluminum
  • PVC
  • Copper

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

  • 99%
  • 90%
  • 75%
  • 80%

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

  • 3.0
  • 5.5
  • 2.5
  • 2.0

11: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 10
  • 20
  • 25
  • 15

12: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

13: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 2.5
  • 2.5, 3.0
  • 3.0, 3.5
  • 6.6, 6.6

14: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there are sprinklers above
  • When it's used as part of a supply or return air system
  • When its white
  • When there is a space 6' or more above it

15: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

16: A movie theater would be considered a

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

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

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

18: What type of material can't be used on the outlet of a relief valve?

  • Copper
  • Magnesium alloy
  • PVC
  • Stainless steel

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

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

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

  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line
  • Make sure its compatible, notify owner, and notify AHJ.
  • Nothing must be done

21: B3 refrigerants are considered

  • non-toxic but non-flammable
  • toxic and highly flammable
  • toxic but non-flammable
  • non-toxic but flammable

22: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

23: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or less
  • vessels of 3 cubic feet or less

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

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

25: Can ammonia be used on domestic system?

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