ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

  • Zinc
  • Magnesium
  • Nickel
  • Copper

3: What refrigerant doesn't have to be classified?

  • R-134A
  • R-717
  • R-422A
  • R-718

4: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

5: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • high and low pressure controls

6: Pressure relief valves shall be marked with the data from

  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section XIII Division of the ASME Boiler & Pressure Code

7: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

8: What is an egress?

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

9: How many different groups of refrigerants are there?

  • 3
  • 11
  • 7
  • 15

10: 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.

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

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

12: A Low-Probability System

  • 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 will enter the occupied space
  • 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

13: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 6.6 lbs
  • 13.9 lbs
  • 22 lbs
  • 44 lbs

14: What pipe can not be used for refrigeration?

  • M
  • N
  • K
  • L

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

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

16: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-113
  • R-502
  • R-12

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

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

18: What would be the classification for Stop & Shop grocery store?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Instituional

19: 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

20: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 100
  • 50
  • 550
  • 350

21: Class 3 refrigerants are

  • non-flammable
  • highly flammable
  • toxic
  • non-toxic

22: A class B2 refrigerant is considered

  • toxic and somewhat flammable
  • non-toxic and highly flammable
  • toxic and non-flammable
  • non-toxic and non-flammable

23: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

24: 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

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

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