ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The color code of a tank of ammonia is

  • silver
  • white
  • light green
  • lavender

2: What is the refrigerant dichlorodifluoromethane?

  • R-134A
  • R-12
  • R-22
  • R-123

3: 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
  • 6.6, 6.6
  • 2.5, 3.0
  • 3.0, 3.5

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

  • True
  • False

5: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

6: A hotel is considered a _______ occupancy.

  • commercial
  • residential
  • mercantile
  • institutional

7: Joints in refrigeration piping must be _____ before being covered?

  • Inspected
  • Pressurized
  • Leak tested
  • Insulated

8: The certificate of inspection

  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be authorized by a notarized insurance company
  • shall be posted and protected from dirt, water, and other elements
  • shall be posted on the compressor shell or electrical panel at the unit

9: 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

10: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 50
  • 350
  • 550
  • 100

11: 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

12: What is R-611’s ASHRAE Safety Code?

  • B3
  • B2
  • C3
  • A2

13: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • phosgene gas sening
  • refrigerant sensing
  • A group sensing
  • CO Sensing

14: How many groups of refrigerants are there?

  • 1
  • 3
  • 7
  • 5

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

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

16: Ammonia is under what safety classification?

  • B3
  • B1
  • A3
  • B2

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

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

18: 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

19: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • public assembly occupancy
  • institutional occupancy
  • illegal occupancy
  • commercial occupancy

20: What is not a requirement of a class T machine room?

  • self-closing doors
  • fire hose connection to the building fire protection system
  • automatic ventilation
  • tight fitting doors

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

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

22: 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

23: 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
  • service manuals
  • safe access

24: What is R-22?

  • Chlorodifluoromethane
  • HFC
  • CCFCM
  • Chlorofluoromethane

25: Dual-pressure relief devices should be installed on

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