ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

2: Class T machine room

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

3: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 9.00'
  • 7.25'
  • 8'4"
  • 7.00'

4: Most CFC's are

  • inert but toxic
  • flammable
  • toxic
  • inert

5: Name three things that must be done when changing refrigeration lubricant?

  • Nothing must be done
  • Place sign, check for leaks, insulate
  • You can't change lubricants.
  • Make sure it's compatible, notify owner, notify AHJ

6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's water
  • Because it's cheap
  • Because it's a non-flammable refrigerant

7: The Board of Boilers adopts by reference

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

8: When should a relief valve start to function?

  • Before the purge station discharges
  • Two times it's working pressure
  • At it's set pressure
  • 10 psi before it's set pressure

9: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

10: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Glove valve
  • Rupture disk
  • Gate valve

11: 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

12: A class A3 refrigerant is considered

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

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

  • 5.5
  • 2.0
  • 2.5
  • 3.0

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

  • Instituional
  • Large mercantile
  • Place of assembly
  • Industrial

15: How many groups of refrigerants are there?

  • 7
  • 3
  • 1
  • 5

16: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class A machinery room
  • Class B machinery room
  • Class M machinery room
  • Class T machinery room

17: A restaurant is classified as a

  • large mercantile occupancy
  • mixed occupancy
  • public assembly occupancy
  • commercial occupancy

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

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

19: 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

20: What is R-22?

  • HFC
  • Chlorodifluoromethane
  • Chlorofluoromethane
  • CCFCM

21: Name an HCFC refrigerant(s):

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

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: 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

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

  • 660 lbs
  • 330 lbs.
  • 55 lbs
  • 550 lbs

25: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above