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: A pressure relief should be located at least _______ from windows and doors.

  • 30'
  • 15'
  • 20'
  • 25'

3: A class A3 refrigerant is considered

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

4: Which refrigerant(s) is an HFC?

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

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

6: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • outside the machinery room
  • compressor
  • boiler
  • evaporator

7: 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

8: How many flammability classifications are refrigerants in?

  • 3
  • 5
  • 2
  • 7

9: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Muffler
  • Moisture indicator
  • Foot valve
  • Stop valve

10: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 80
  • 100
  • 90
  • 110

11: Who approves containers for refrigerants?

  • D.O.T
  • D.O.D
  • D.O.E
  • E.P.A

12: How many refrigerant classifications are there for flammability?

  • 2
  • 1
  • 3
  • 7

13: Class T machine room

  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall include closets used for setting equipment

14: 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

15: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

16: 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.

  • 10
  • 15
  • 20
  • 25

17: 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

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

  • 90%
  • 99%
  • 80%
  • 75%

19: R-22 is considered a(n)

  • HFC
  • HCFC
  • HCFCH
  • CFC

20: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Tight fitting doors
  • Automatic ventilation
  • Self-closing doors

21: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • B-1
  • B-2
  • A-1

22: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within

  • 30 days
  • 14 days
  • 2 months
  • 1 week

23: A professional or office building would be considered what type of occupancy?

  • mercantile
  • public assembly
  • commercial
  • business

24: All electrical work done on refrigeration systems must comply with

  • NEC and Massachusetts Modifications
  • ASHREA-15 Section 9.2.1
  • OSHA
  • Department of Energy

25: 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.

  • 6.6, 6.6
  • 2.5, 2.5
  • 2.5, 3.0
  • 3.0, 3.5