ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Halogen refrigerants are corrosive to which type of metal?

  • copper
  • black iron
  • stainless steel
  • magnesium

2: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

3: A Low-Probability System

  • 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
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space

4: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • of Group B2 refrigerant shall be prohibited
  • shall not be prohibited
  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited

5: How many refrigerant classifications are there for flammability?

  • 7
  • 1
  • 2
  • 3

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

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

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

  • C3
  • B2
  • A3
  • A2

8: A hotel is considered a _______ occupancy.

  • institutional
  • mercantile
  • residential
  • commercial

9: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

10: Which occupancy can ammonia be used in?

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

11: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Copper
  • Zinc
  • Nickel
  • Magnesium

12: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 100
  • 1,000
  • 10,000
  • 100,000

13: What pipe can not be used for refrigeration?

  • N
  • K
  • L
  • M

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

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

15: R-22 falls under which safety classification?

  • A-2
  • A-1
  • B-1
  • B-2

16: No open flames are allowed in the machinery room unless?

  • Approved by the authorized person
  • Never can be allowed
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room

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

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

18: 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

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

  • you can't change refrigerants
  • place sign, check for leaks, insulate
  • nothing must be done
  • make sure it's compatible, notify owner, notify A.H.J

20: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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

21: 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.
  • mercantile occupancy
  • commercial occupancy

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

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

23: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

24: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 80%
  • 99%
  • 75%
  • 90%

25: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above