ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • is a reciprocating type compressor with 2 or more pistons
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber

2: B3 refrigerants are considered

  • non-toxic but non-flammable
  • non-toxic but flammable
  • toxic and highly flammable
  • toxic but non-flammable

3: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

4: 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

5: What is R-22?

  • CCFCM
  • Chlorofluoromethane
  • HFC
  • Chlorodifluoromethane

6: 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

7: What happens after your initial inspection of a pressure vessel?

  • Notify the AHJ to let them know that the system been inspected
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the Fire Marshal that the system has been inspected and approved

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

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

9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When its white
  • When there are sprinklers above
  • When it's used as part of a supply or return air system
  • When there is a space 6' or more above it

10: Can ammonia be used on domestic system?

  • no, unless there is proper ventilation system installed
  • yes
  • no
  • yes, for systems under 10 tons

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

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

12: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 3/32"
  • 1/16"
  • 1/8"

13: What is an example of institutional occupancy?

  • Dorms
  • Shopping mall
  • Hospital
  • Football stadium

14: Refrigerants shall be classified by

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

15: When an inspection is needed, how often must it be done?

  • annually
  • every 24 months
  • every 36 months
  • every 18 months

16: 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

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

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

18: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

19: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • gas masks must be worn
  • explosion precautions must be taken
  • no flames shall be permitted
  • the owner shall be informed

20: 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

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

  • True
  • False

22: High pressure controls should be set no higher than

  • 10% of set point
  • 90% of set point
  • 25% of set point
  • 80% of set point

23: How many different groups of refrigerants are there?

  • 3
  • 11
  • 15
  • 7

24: A relief valve shall be located at least ___ above grade.

  • 15'
  • 10'
  • 25'
  • 36'

25: R-22 falls under which safety classification?

  • B-2
  • B-1
  • A-2
  • A-1