ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

3: What type refrigerant is NOT ozone depleting?

  • CFC
  • Halon
  • HCFC
  • HFC

4: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

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

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

6: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 33
  • 50
  • 18
  • 22

7: 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

8: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper
  • Copper tubing
  • Brass

9: Ammonia is under what safety classification?

  • B3
  • B1
  • B2
  • A3

10: 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

11: 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

  • boiler
  • outside the machinery room
  • evaporator
  • compressor

12: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with RX-11
  • Flush with R-11
  • Flush with R-718
  • Flush with ammonia

13: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UM
  • UL and UR
  • UV or UR
  • UM or UL

14: How are refrigerant blends classified?

  • Blends don't have to be classified
  • Based on worst case fractionation
  • Based on the oil used
  • Based on best case Fractionation

15: Most CFC's are

  • toxic
  • inert
  • inert but toxic
  • flammable

16: What pipe can not be used for refrigeration?

  • L
  • N
  • M
  • K

17: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact

18: What section governs pressure vessels?

  • Section 8 ASHREA 15 ASME unfired
  • OSHA
  • Section 1 ASHREA 15 ASME fired
  • Section ASHREA 34

19: NH3 is

  • lithium bromide
  • R-508A
  • R-718
  • ammonia

20: Refrigerants shall be classified by

  • toxicity and flammability
  • requirements for commercial, industrial, and residential occupancies
  • maximum permissible quantities of each group
  • color codes

21: 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)

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

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

  • 2.5
  • 2.0
  • 3.0
  • 5.5

23: Large mercantile occupancy is

  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise

24: What is Trichlorotrifluoromethane?

  • R-11
  • R-12
  • R-13
  • R-113

25: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 36
  • 48
  • 24
  • 18