ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 66
  • 25
  • 50
  • 22

2: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 15
  • 10
  • 25
  • 20

3: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • breaker panel in
  • load-side of the contactor in

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

  • EPO
  • DOT
  • RSES
  • EPA

5: When must refrigeration system covered by the code be inspected?

  • Annually
  • Upon installation
  • Annually and when installed
  • Not required

6: R-11 belongs to Group

  • A-2
  • B-3
  • B-1
  • A-1

7: A High-Probablity system

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is a system highly likely to leak from a failed connection or component of such system
  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space

8: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.0
  • 3.0
  • 2.5
  • 5.5

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

  • relief valve
  • service valve
  • bleed valve
  • condenser

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

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

13: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

14: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • illegal occupancy
  • institutional occupancy
  • public assembly occupancy
  • commercial occupancy

15: Who is permitted to access a refrigeration machine room?

  • Authorized persons only
  • Anyone, it's a completely safe area
  • Contractors only
  • Any employee

16: What is a Category "D" fluid?

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

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

  • B-2
  • A-3
  • A-1
  • C-3

18: 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 40'
  • At least 20'
  • At least 30'

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

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

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

  • 80%
  • 100%
  • 75%
  • 90%

21: How far from the ground does a relief valve need to be?

  • At least 25' above grade
  • Not more than 3' above grade
  • At least 20' above grade
  • At least 15' above grade

22: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 100
  • 80
  • 90
  • 110

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

  • 1
  • 20
  • 15
  • 5

24: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Tight fitting doors
  • Automatic ventilation
  • Self-closing doors

25: Most CFC's are

  • toxic
  • inert but toxic
  • flammable
  • inert