ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: How many refrigerant classifications are there for flammability?

  • 2
  • 1
  • 7
  • 3

3: Relief valves are rated in

  • gallons of water per minute
  • gallons of water per hour
  • pounds of air per minute
  • pounds of air per hour

4: Class 3 refrigerants are

  • non-toxic
  • highly flammable
  • toxic
  • non-flammable

5: 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

6: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • HCFC-123
  • CFC-11
  • ammonia
  • Lithium bromide

7: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 1000F
  • 600F
  • 800F
  • 700F

8: R-22 falls under which safety classification?

  • B-1
  • A-2
  • A-1
  • B-2

9: What refrigerant were phased out in 2004?

  • R-12
  • R-134a
  • R-11
  • R-22

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

  • 18
  • 48
  • 24
  • 36

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

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

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

  • 50
  • 22
  • 18
  • 33

13: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

14: Most CFC's are

  • inert
  • flammable
  • toxic
  • inert but toxic

15: R-11 belongs to Group

  • B-3
  • B-1
  • A-2
  • A-1

16: What is Trichlorotrifluoromethane?

  • R-13
  • R-113
  • R-11
  • R-12

17: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

18: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space

19: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Copper
  • Magnesium alloy
  • Aluminum

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

21: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type K
  • Type L
  • Type N

22: Which refrigerant class listed below is the most flammable?

  • C-3
  • A-1
  • B-2
  • A-3

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

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

24: How many refrigerant classifications are there for toxicity?

  • 1
  • 3
  • 5
  • 2

25: Fusible plugs shall not be used with pressure vessels of

  • 15 cubic feet or more
  • 3 cubic feet or more
  • 15 square feet or less
  • 3 cubic feet or less