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 pressure of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons
  • 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

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

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

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

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

4: 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

5: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

6: What refrigerant doesn't have to be classifted?

  • R-711
  • R-718
  • R-134a
  • R-717

7: Ammonia is under what safety classification?

  • B1
  • B2
  • B3
  • A3

8: What is Trichlorotrifluoromethane?

  • R-12
  • R-11
  • R-13
  • R-113

9: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

10: Who approves containers for refrigerants?

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

11: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 24
  • 18
  • 10
  • 15

12: Dual-pressure relief devices should be installed on

  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or less
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or less

13: 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.

  • 20
  • 15
  • 25
  • 10

14: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection and a rupture disc
  • over pressure protection
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection as well as a temperature protection device

15: A class B1 refrigerant is considered

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

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

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

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

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

18: 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

19: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

20: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

21: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • either a fusible plug or a pressure relief device
  • a fusible plug
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a pressure relief device

22: What section of ASHRAE-15 governs pressure vessels?

  • Section 7 ASHRAE-15 ASME VIII fired
  • Section 6 ASHRAE-34 ASME VIII unfired
  • Section 9 ASHRAE-15 ASME VIII unfired
  • OSHA

23: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 10
  • 15
  • III
  • 25

24: 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
  • 110
  • 90

25: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above