ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • A-3
  • B-2
  • C-3
  • A-1

2: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-12
  • R-113
  • R-11

3: A relief valve shall be located at least ___ above grade.

  • 15'
  • 25'
  • 10'
  • 36'

4: A pressure relief should be located at least _______ from windows and doors.

  • 30'
  • 15'
  • 25'
  • 20'

5: 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 reciever
  • between the compressor and oil separator

6: 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

7: 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

8: 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

9: A professional or office building would be considered what type of occupancy?

  • mercantile
  • business
  • public assembly
  • commercial

10: What section of ASHRAE-15 governs pressure vessels?

  • OSHA
  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired
  • Section 6 ASHRAE-34 ASME VIII unfired

11: A class B1 refrigerant is considered

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

12: 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

13: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • licensed welder
  • licensed technician
  • competent welder
  • welder qualified

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

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

15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 100%
  • 80%
  • 75%
  • 90%

16: What is Trichlorotrifluoromethane?

  • R-12
  • R-13
  • R-113
  • R-11

17: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

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

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

19: What refrigerant were phased out in 2004?

  • R-12
  • R-22
  • R-134a
  • R-11

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

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

21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

22: 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

23: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

24: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a pressure relief device
  • a fusible plug
  • either a fusible plug or a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified

25: Halogen refrigerants are corrosive to which type of metal?

  • black iron
  • copper
  • stainless steel
  • magnesium