ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Can you use Ammonia in industrial applications?

  • No, never
  • Yes, always
  • When mixed with R-718
  • Yes, Under certain condidtions

2: 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.

3: R-22 falls under which safety classification?

  • A-2
  • A-1
  • B-2
  • B-1

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

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

5: What is not a requirement of a class T machine room?

  • tight fitting doors
  • fire hose connection to the building fire protection system
  • self-closing doors
  • automatic ventilation

6: What type of relief valve is used on a CO2 system?

  • fusible plug
  • glove disc
  • gate valve
  • rupture disc

7: A Low-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 any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space

8: What is Trichlorotrifluoromethane?

  • R-11
  • R-12
  • R-13
  • R-113

9: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with RX-11
  • Flush with R-11
  • Flush with R-718
  • Flush with ammonia

10: 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

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

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

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

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

13: A declaration test is needed when the system contains more than

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

14: Refrigerants shall be classified by

  • toxicity and flammability
  • requirements for commercial, industrial, and residential occupancies
  • maximum permissible quantities of each group
  • color codes

15: 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.

  • 25
  • 10
  • 20
  • 15

16: Doors communicating with outside from a mechanical room must be?

  • Steel, approved, weather-stripped
  • Self-closing, aligned, fire door
  • Self-closing, wooden, fire door
  • Self-closing, approved, fire door

17: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Aluminum
  • Copper
  • Stainless steel

18: 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

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

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

20: How many refrigerant classifications are there for flammability?

  • 7
  • 1
  • 2
  • 3

21: Fusible plugs shall not be used with pressure vessels of

  • 15 cubic feet or more
  • 3 cubic feet or less
  • 3 cubic feet or more
  • 15 square feet or less

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

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

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

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

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: What refrigerant is an inorganic compound?

  • Ammonia
  • R-22
  • R-410A
  • R-132A