ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

2: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

3: Refrigerants shall be classified by

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

4: What refrigerant were phased out in 2004?

  • R-12
  • R-11
  • R-134a
  • R-22

5: 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

6: R-22 falls under which safety classification?

  • A-2
  • A-1
  • B-1
  • B-2

7: Each machinery room shall contain

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

8: 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

9: What is the refrigerant chlorodifluoromethane?

  • R-123
  • R-22
  • R-12
  • R-134a

10: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

11: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 2
  • 3
  • 1
  • 5

12: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • relief plug
  • rupture plug
  • fusible plug
  • fusion plug

13: 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

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

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

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

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

16: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

17: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • institutional occupancy
  • mixed occupancy
  • public assembly occupancy
  • commercial occupancy

18: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 40'
  • At least 20'
  • At least 30'

19: How much refrigerant can be stored in a mechanical room outside of the system?

  • 330
  • 150
  • 100
  • 200

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: What type of material can't be used on the outlet of a relief valve?

  • PVC
  • Magnesium alloy
  • Stainless steel
  • Copper

22: B3 refrigerants are considered

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

23: When should a relief valve start to function?

  • Before the purge station discharges
  • At it's set pressure
  • Two times it's working pressure
  • 10 psi before it's set pressure

24: Who approves containers for refrigerants?

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

25: 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.