ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • Muffler
  • Foot valve
  • Moisture indicator
  • Stop valve

2: What is the refrigerant chlorodifluoromethane?

  • R-12
  • R-134a
  • R-123
  • R-22

3: A relief valve discharge capacity is rated in

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

4: Name three things that must be done when changing refrigeration lubricant?

  • Nothing must be done
  • You can't change lubricants.
  • Place sign, check for leaks, insulate
  • Make sure it's compatible, notify owner, notify AHJ

5: What do you need to do when you install a new system?

  • Add refrigerant
  • Have it inspected
  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading

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

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

7: NH3 is

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

8: A High-Probablity system

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

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

  • 2
  • 3
  • 1
  • 5

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

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

11: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

12: 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, 2.5
  • 6.6, 6.6
  • 3.0, 3.5
  • 2.5, 3.0

13: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • mercantile occupancy
  • business occupancy
  • commercial occupancy
  • public assembly occupancy.

14: The discharge relief valve is located (9.4.6)

  • between the compressor and the stop valve
  • between the compressor and oil separator
  • on top of the condensor
  • between the compressor and reciever

15: A movie theater would be considered a

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

16: What does safe access mean?

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

17: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

19: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

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

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

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

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

22: Which refrigerant replaced R-12?

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

23: How many refrigerant classifications are there for toxicity?

  • 5
  • 2
  • 1
  • 3

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

  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line

25: 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