ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Doors communicating with outside from a mechanical room must be?

  • Self-closing, aligned, fire door
  • Self-closing, approved, fire door
  • Self-closing, wooden, fire door
  • Steel, approved, weather-stripped

2: Direct systems using Group II refrigerants

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

3: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

4: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

5: A pressure relief should be located at least _______ from windows and doors.

  • 15'
  • 25'
  • 30'
  • 20'

6: 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
  • 500 lbs

7: All electrical work done on refrigeration systems must comply with

  • OSHA
  • ASHREA-15 Section 9.2.1
  • NEC and Massachusetts Modifications
  • Department of Energy

8: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

9: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • load-side of the contactor in
  • first disconnect in
  • breaker panel in
  • 24 volt secondary side of the Class 2 transformer to the thermostat

10: Where a refrigeration or air conditioning system is installed,

  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • A field inspection shall be made before it is put into service
  • the form or certificate shall be authorized by the Department of Public Safety
  • it shall not be operated below prescribed pressuers

11: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 80%
  • 99%
  • 75%
  • 90%

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

  • Copper
  • Magnesium
  • Aluminum
  • Zinc

13: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • commercial occupancy
  • public assembly occupancy
  • institutional occupancy
  • illegal occupancy

14: What is Trichlorotrifluoromethane?

  • R-12
  • R-113
  • R-13
  • R-11

15: What refrigerant doesn't have to be classified?

  • R-134A
  • R-718
  • R-422A
  • R-717

16: 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

17: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “U” or “UM”
  • “UL”
  • “UV”
  • “UM” and “UV”

18: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

19: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

20: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall be prohibited
  • of Group B2 refrigerant shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited

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

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

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

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

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

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

25: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct