ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

3: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.5
  • 5.5
  • 3.0
  • 2.0

4: How far from the ground does a relief valve need to be?

  • At least 15' above grade
  • Not more than 3' above grade
  • At least 25' above grade
  • At least 20' above grade

5: The certificate of inspection

  • shall be posted and protected from dirt, water, and other elements
  • 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 on the compressor shell or electrical panel at the unit

6: What refrigerant were phased out in 2004?

  • R-22
  • R-11
  • R-12
  • R-134a

7: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-1
  • A-1
  • A-2
  • B-2

8: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • MSCA Code

9: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

10: A class A3 refrigerant is considered

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

11: What type of relief valve is used on a CO2 system?

  • fusible plug
  • rupture disc
  • glove disc
  • gate valve

12: 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 technician
  • competent welder
  • welder qualified
  • licensed welder

13: High pressure controls should be set no higher than

  • 10% of set point
  • 80% of set point
  • 90% of set point
  • 25% of set point

14: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

15: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

16: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

17: What would be the classification for Stop & Shop grocery store?

  • Place of assembly
  • Large mercantile
  • Industrial
  • Instituional

18: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 1
  • 3
  • 5
  • 2

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

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

20: When an inspection is needed, how often must it be done?

  • every 36 months
  • annually
  • every 18 months
  • every 24 months

21: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use fusible plugs
  • shall use pressure relief devices
  • shall use pressure relief devices or fusible plugs
  • shall use rupture discs or duel pressure relief valves

22: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • it shall not be operated below prescribed pressures
  • the form of certificate shall be authorized by the Department of Pubic safety

23: The discharge relief valve is located (9.4.6)

  • between the compressor and oil separator
  • between the compressor and the stop valve
  • between the compressor and reciever
  • on top of the condensor

24: What is the refrigerant chlorodifluoromethane?

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

25: 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