ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Muffler
  • Moisture indicator
  • Stop valve

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

  • C3
  • A3
  • B2
  • A2

4: A restaurant is classified as a

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

5: R-717 is

  • water
  • ammonia
  • carbon dioxide
  • trichloromethane

6: 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
  • 100
  • 550
  • 350

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

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

8: Ammonia (NH3) is a group III refrigerant

  • True
  • False

9: What is an egress?

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

10: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

11: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

12: _____ and its alloys are suitable for use with ammonia systems.

  • Aluminum
  • Copper
  • Magnesium
  • Zinc

13: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • outside the room, immediately adjacent to each door
  • inside the room, immediately adjacent to each door
  • on a conspicuous card located near the evaporator
  • on a conspicuous card located near the compressor

14: A relief valve shall be located at least ___ above grade.

  • 15'
  • 25'
  • 36'
  • 10'

15: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-12
  • R-11
  • R-113

16: What refrigerant is an inorganic compound?

  • Ammonia
  • R-410A
  • R-132A
  • R-22

17: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited
  • of Group B2 refrigerant shall be prohibited

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

  • Pressurized
  • Inspected
  • Insulated
  • Leak tested

19: 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, 3.0
  • 3.0, 3.5
  • 6.6, 6.6
  • 2.5, 2.5

20: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 1
  • 2
  • 3
  • 5

21: Stop valves shall not be permitted between the system and the

  • bleed valve
  • relief valve
  • condenser
  • service valve

22: What is a Category "D" fluid?

  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • 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 fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F

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

  • A-1
  • C-3
  • B-2
  • A-3

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

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

25: High pressure controls should be set no higher than

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