ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: 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.

  • 25
  • 15
  • 10
  • 20

3: Ammonia (NH3) is a group III refrigerant

  • True
  • False

4: Class T machine room

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

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

  • commercial
  • public assembly
  • mercantile
  • business

6: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Nickel
  • Zinc
  • Copper
  • Magnesium

7: Which of the following is an inorganic refrigerant?

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

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

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

9: 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

10: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.

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

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

12: B3 refrigerants are considered

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

13: What is the refrigerant chlorodifluoromethane?

  • R-22
  • R-123
  • R-12
  • R-134a

14: NH3 is

  • ammonia
  • lithium bromide
  • R-508A
  • R-718

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

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

16: 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

17: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

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

  • 75%
  • 80%
  • 100%
  • 90%

19: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Zinc
  • Aluminum
  • Magnesium

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

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

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

  • A-3
  • C-3
  • B-2
  • A-1

22: Dual-pressure relief devices should be installed on

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

23: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • no flames shall be permitted
  • explosion precautions must be taken
  • gas masks must be worn
  • the owner shall be informed

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

  • R-11
  • R-113
  • R-22
  • R-12

25: How many CFMs are required per square foot of commercial office occupied space

  • 15 CFM
  • 20 CFM
  • .5 CFM
  • 5 CFM