ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

2: Who approves containers for refrigerants?

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

3: What refrigerant were phased out in 2004?

  • R-12
  • R-134a
  • R-22
  • R-11

4: A High-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied 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 form a failed connection or component of such system

5: How many refrigerant classifications are there for flammability?

  • 1
  • 7
  • 3
  • 2

6: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • PSIG
  • PSIA
  • Pounds of air per minute.

7: Which refrigerant replaced R-12?

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

8: Liquid level gauges must be provided with what?

  • A red line
  • Automatic shut-offs
  • A relief valve
  • A low level mark

9: 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.

  • 6.6, 6.6
  • 3.0, 3.5
  • 2.5, 2.5
  • 2.5, 3.0

10: 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

11: How many different groups of refrigerants are there?

  • 11
  • 7
  • 15
  • 3

12: 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.

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

13: The gauge thickness required on a CO2 tank construction is

  • 1/16"
  • 5/16"
  • 1/8"
  • 3/32"

14: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • lower
  • there is no Group B1 refrigerants
  • higher
  • the same

15: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

16: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • the return air ducted system
  • the mechanical room housing the refrigeration system
  • Machinery rooms need not be vented

17: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

18: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

19: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • high limit control
  • zone valve
  • pressure relief device

20: How many groups of refrigerants are there?

  • 1
  • 3
  • 7
  • 5

21: Single compound Refrigerants are classified by what two criteria?

  • Flammability and temperature range
  • Temperature range and hazardousness
  • Weight and color
  • Flammability and toxicity

22: What is R-22?

  • Chlorofluoromethane
  • HFC
  • Chlorodifluoromethane
  • CCFCM

23: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

24: 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

25: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • either a fusible plug or a pressure relief device
  • a pressure relief device
  • a fusible plug