ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Who is permitted to access a refrigeration machine room?

  • Anyone, it's a completely safe area
  • Authorized persons only
  • Contractors only
  • Any employee

2: Fusible plugs shall not be used with pressure vessels of

  • 15 square feet or less
  • 15 cubic feet or more
  • 3 cubic feet or more
  • 3 cubic feet or less

3: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 6.6 lbs
  • 13.9 lbs
  • 44 lbs

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

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

5: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 1,000
  • 6.6
  • 110
  • 330

6: When should a relief valve start to function?

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

7: What must be done if refrigeration lines pass through a concrete floor?

  • moisture barrier
  • installed through a pipe casing
  • insulated
  • leak checked

8: How many flammability classifications are refrigerants in?

  • 3
  • 7
  • 2
  • 5

9: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 66
  • 22
  • 25
  • 50

10: R-717 is

  • trichloromethane
  • carbon dioxide
  • ammonia
  • water

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

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

12: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-22
  • R-12
  • R-113
  • R-11

13: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's cheap
  • Because it's a non-flammable refrigerant
  • Because it's water
  • R-718 is not rated unlimited because it's a dangerous refrigerant

14: What is Trichlorotrifluoromethane?

  • R-12
  • R-13
  • R-11
  • R-113

15: 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
  • make sure it's compatible, notify owner, notify A.H.J
  • you can't change refrigerants

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

  • 2.2
  • 1.2
  • 1.5
  • 1

17: Can ammonia be used on domestic system?

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

18: Which refrigerant class listed below is the most flammable?

  • A-1
  • A-3
  • C-3
  • B-2

19: 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
  • 15
  • 25
  • 20

20: Refrigeration piping before being buried shall be

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

21: Fusible plugs must have what marked on them?

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

22: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the authorized person
  • Approved by the installing contractor

23: What is R-22?

  • Chlorofluoromethane
  • CCFCM
  • Chlorodifluoromethane
  • HFC

24: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

25: What happens after your initial inspection of a pressure vessel?

  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected
  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.