ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 500 lbs
  • 660 lbs
  • 55 lbs
  • 330 lbs

3: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

4: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

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

  • True
  • False

6: 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

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

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

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

8: What is an egress?

  • An escape route
  • A valve put on the low side of the system to prevent frosting
  • An entrance or exit
  • A code violation

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: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

11: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

12: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

13: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • outside the room, immediately adjacent to each door
  • inside the room, immediately adjacent to each door
  • on a conspicuous card located near the compressor
  • on a conspicuous card located near the evaporator

14: Name a CFC refrigerant(s):

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

15: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 1,000
  • 100
  • 10,000
  • 100,000

16: A class A3 refrigerant is considered

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

17: What would be the classification of a church?

  • Large mercantile
  • Institutional
  • Industrial
  • Place of assembly

18: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

19: R-717 is

  • ammonia
  • carbon dioxide
  • trichloromethane
  • water

20: Which refrigerant replaced R-12?

  • R-134A
  • R-22
  • R-410A
  • R-407A

21: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • HCFC-123
  • CFC-11
  • Lithium bromide
  • ammonia

22: B3 refrigerants are considered

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

23: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 20'
  • At least 30'
  • At least 40'

24: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

25: 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.

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