ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

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

  • 5
  • 3
  • 2
  • 1

3: Pipe identification labels are required when the system contains more than

  • 110 lbs
  • 65 lbs
  • 55 lbs
  • 120 lbs

4: 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

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

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

6: What kind of material can't be used on the outlet of a relief valve?

  • PVC
  • Stainless Steel
  • Aluminum
  • Copper

7: What refrigerant were phased out in 2004?

  • R-12
  • R-134a
  • R-11
  • R-22

8: How many groups of refrigerants are there?

  • 3
  • 7
  • 1
  • 5

9: How many refrigerant classifications are there for toxicity?

  • 3
  • 1
  • 2
  • 5

10: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

11: 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.

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

12: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the aggregate of the high side and low side
  • 2.5 times the design pressure
  • the high side
  • the low side

13: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

14: A High-Probability System

  • is a system highly likely to leak form a failed connection or component of such 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

15: What is an egress?

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

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

17: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

18: 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)

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

19: Liquid level gauges must be provided with what?

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

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

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

21: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

22: 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

23: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Leak checked
  • Certified
  • Classifed
  • Insulated and installed in a pipe duct (Encased)

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

  • 100
  • 1
  • 10
  • 50

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

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