Topics: ASHRAE/CMR
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.