ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: The Board of Boilers adopts by reference

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

3: B3 refrigerants are considered

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

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

  • B-1
  • B-2
  • A-2
  • A-1

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

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

6: When a refrigeration or air conditioning system is installed

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

7: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 10
  • 15
  • 24
  • 18

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

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

9: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms

10: 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

11: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

  • 36'
  • 10'
  • 15'
  • 25'

13: The gauge thickness required on a CO2 tank construction is

  • 1/8"
  • 3/32"
  • 1/16"
  • 5/16"

14: 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

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

  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line
  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.

16: How many groups of refrigerants are there?

  • 1
  • 3
  • 7
  • 5

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

  • Leak tested
  • Insulated
  • Inspected
  • Pressurized

18: The Department that certifies the transportation of refrigerant is the

  • EPA
  • DOT
  • RSES
  • EPO

19: A relief valve discharge capacity is rated in

  • PSIA
  • Pounds of air per minute.
  • temperature minus pounds of air per second divided by release rate squared
  • PSIG

20: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

21: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • evaporator
  • compressor
  • boiler
  • outside the machinery room

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

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

23: 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.

24: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • high and low pressure controls
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

25: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 80%
  • 100%
  • 90%
  • 75%