ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: R-717 is

  • water
  • ammonia
  • carbon dioxide
  • trichloromethane

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

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

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

  • 5
  • 1
  • 20
  • 15

4: Most CFC's are

  • toxic
  • flammable
  • inert but toxic
  • inert

5: Who approves containers for refrigerants?

  • D.O.T
  • E.P.A
  • D.O.D
  • D.O.E

6: 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
  • 2.5 times the design pressure
  • the low side
  • the aggregate of the high side and low side

7: Dual-pressure relief devices should be installed on

  • vessels of 3 cubic feet or less
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or less

8: What would be the classification of a church?

  • Place of assembly
  • Large mercantile
  • Industrial
  • Institutional

9: NH3 is

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

10: What pipe can not be used for refrigeration?

  • M
  • K
  • N
  • L

11: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

12: How many different groups of refrigerants are there?

  • 7
  • 15
  • 3
  • 11

13: 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.

  • 7.25'
  • 9.00'
  • 7.00'
  • 8'4"

14: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

15: What is an egress?

  • A code violation
  • A valve put on the low side of the system to prevent frosting
  • An entrance or exit
  • An escape route

16: What section of ASHRAE-15 governs pressure vessels?

  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 6 ASHRAE-34 ASME VIII unfired
  • OSHA
  • Section 7 ASHRAE-15 ASME VIII fired

17: 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
  • low side of the system
  • high side of the system

18: Ammonia (NH3) is a group III refrigerant

  • True
  • False

19: 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 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

20: High pressure controls should be set no higher than

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

21: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.

  • 350
  • 250
  • 400
  • 100

22: A declaration test is needed when the system contains more than

  • 120 lbs
  • 110 lbs
  • 55 lbs
  • 65 lbs

23: 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

24: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

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

  • aluminum
  • zinc
  • magnesium
  • all of the above