ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • T&P device
  • Circuit Breaker
  • Temperature limiter device
  • Relief valve

2: 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'
  • 8'4"
  • 7.00'
  • 7.25'

3: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

4: High pressure controls should be set no higher than

  • 10% of set point
  • 90% of set point
  • 25% of set point
  • 80% of set point

5: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • the low side
  • 2.5 times the design pressure
  • the aggregate of the high side and low side

6: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 30'
  • At least 40'
  • At least 20'

7: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

8: R-11 belongs to Group

  • A-1
  • B-3
  • A-2
  • B-1

9: All serviceable components of a refrigeration system shall be provided with

  • service manuals
  • safe access
  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • manufactures instructions on start-up procedures

10: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

11: Name an HCFC refrigerant(s):

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

12: Refrigeration piping before being buried shall be

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

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

  • Magnesium alloy
  • PVC
  • Copper
  • Stainless steel

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

  • 5
  • 20
  • 1
  • 15

15: R-22 is considered a(n)

  • HCFC
  • CFC
  • HFC
  • HCFCH

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

  • 18
  • 36
  • 24
  • 48

17: What would be the classification of a church?

  • Place of assembly
  • Institutional
  • Industrial
  • Large mercantile

18: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 2.5
  • 6.6, 6.6
  • 2.5, 3.0
  • 3.0, 3.5

19: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • Machinery rooms need not be vented
  • the return air ducted system
  • the mechanical room housing the refrigeration system

20: 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

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

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

22: A restaurant is classified as a

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

23: A class A3 refrigerant is considered

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

24: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • 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

25: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above