ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A positive displacement compressor is

  • is a reciprocating type compressor with 2 or more pistons
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber

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

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

3: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use pressure relief devices or fusible plugs
  • shall use pressure relief devices
  • shall use fusible plugs

4: Class A refrigerants are considered

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

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

  • 24
  • 18
  • 36
  • 48

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

  • Inspected
  • Pressurized
  • Leak tested
  • Insulated

7: NH3 is

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

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

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

9: How many gallons of water per pound of ammonia do you need?

  • 20
  • 15
  • 5
  • 1

10: What is a Category "M" fluid?

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

11: When should a relief valve start to function?

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

12: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the authorized person
  • Approved by the installing contractor

13: B3 refrigerants are considered

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

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

  • 75%
  • 90%
  • 100%
  • 80%

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

16: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the vapor side of the system
  • the liquid side of the system
  • high side of the system
  • low side of the system

17: A restaurant is classified as a

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

18: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

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

  • DOT
  • EPA
  • EPO
  • RSES

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

  • 800F
  • 700F
  • 1000F
  • 600F

21: Evaporators within 18" of a heating coil must be equipped with a

  • high limit control
  • low limit control
  • pressure relief device
  • zone valve

22: What must be done if refrigeration lines pass through a concrete floor?

  • installed through a pipe casing
  • leak checked
  • moisture barrier
  • insulated

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

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

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

  • True
  • False

25: What kind of material can't be used on the outlet of a relief valve?

  • Copper
  • Stainless Steel
  • PVC
  • Aluminum