ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the liquid side of the system
  • the vapor side of the system
  • low side of the system
  • high side of the system

2: How many groups of refrigerants are there?

  • 5
  • 3
  • 1
  • 7

3: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • A-2
  • B-1
  • A-1

4: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UM
  • UV or UR
  • UL and UR
  • UM or UL

5: Dual-pressure relief devices should be installed on

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

6: What is a Category "M" fluid?

  • A typical refrigerant used on newer air conditioning and heat pump systems
  • 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
  • Any fluid that exceeds 150 psig and has design temperatures over 366F

7: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

8: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

9: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Aluminum
  • Copper
  • Magnesium alloy

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

  • RSES
  • DOT
  • EPA
  • EPO

11: What refrigerant doesn't have to be classifted?

  • R-134a
  • R-711
  • R-718
  • R-717

12: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

13: A class A3 refrigerant is considered

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

14: Where must a refrigeration contractor's license number be displayed?

  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Truck, office, every job, and on all equipment
  • Trucks, invoices, and advertising

15: Which occupancy can ammonia be used in?

  • commercial
  • depends on the quantity of freon
  • industrial
  • redifential

16: When an inspection is needed, how often must it be done?

  • annually
  • every 36 months
  • every 18 months
  • every 24 months

17: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

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

  • 2.5
  • 5.5
  • 2.0
  • 3.0

19: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • 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 unoccupied space

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

  • R-11
  • R-22
  • R-12
  • R-113

21: Which refrigerant replaced R-12?

  • R-134A
  • R-407A
  • R-410A
  • R-22

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

  • A-1
  • B-2
  • A-3
  • C-3

23: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

24: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • rupture plug
  • relief plug
  • fusible plug
  • fusion plug

25: What does safe access mean?

  • Well-lit exit signs
  • OSHA approved
  • A clear unobstructed path to the equipment and controls
  • Locked doors