ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What is Trichlorotrifluoromethane?

  • R-11
  • R-113
  • R-13
  • R-12

2: A class B1 refrigerant is considered

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

3: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • commercial occupancy
  • mixed occupancy
  • institutional occupancy
  • public assembly occupancy

4: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

5: Can ammonia be used on domestic system?

  • yes
  • no
  • no, unless there is proper ventilation system installed
  • yes, for systems under 10 tons

6: Halogen refrigerants are corrosive to which type of metal?

  • black iron
  • copper
  • stainless steel
  • magnesium

7: Can you use Ammonia in industrial applications?

  • Yes, always
  • Yes, Under certain condidtions
  • No, never
  • When mixed with R-718

8: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

9: 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.

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

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

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

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

  • PVC
  • Stainless Steel
  • Aluminum
  • Copper

12: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

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

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

14: 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

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

  • 36
  • 48
  • 24
  • 18

16: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • nothing must be done
  • make sure it's compatible, notify owner, notify A.H.J
  • place sign, check for leaks, insulate
  • you can't change refrigerants

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

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

18: What is a Category "M" fluid?

  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • 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

19: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-11
  • R-113
  • R-12
  • R-22

20: 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

21: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 44 lbs
  • 22 lbs
  • 13.9 lbs
  • 6.6 lbs

22: Relief valves are rated in

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

23: What is the minimum height refrigeration piping should be placed against walls?

  • 6'
  • Ceiling height
  • 72"
  • 7.25'

24: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 50
  • 550
  • 350
  • 100

25: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 500 lbs
  • 660 lbs
  • 330 lbs