Topics: ASHRAE/CMR
1: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
2: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
3: 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
4: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.00'
- 9.00'
- 8'4"
- 7.25'
5: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
6: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
7: 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
8: What does safe access mean?
- Well-lit exit signs
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Locked doors
9: 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
10: Can ammonia be used on domestic system?
- yes, for systems under 10 tons
- no
- yes
- no, unless there is proper ventilation system installed
11: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 2.5
- 3.0
- 5.5
12: 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
13: 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
- 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
- over pressure protection
14: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- place sign, check for leaks, insulate
15: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 100,000
- 100
- 1,000
16: Relief valves are rated in
- gallons of water per hour
- pounds of air per minute
- gallons of water per minute
- pounds of air per hour
17: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 330
- 100
- 200
18: 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
19: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 90%
- 75%
- 80%
- 99%
20: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
21: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
22: Pipe identification labels are required when the system contains more than
- 65 lbs
- 55 lbs
- 110 lbs
- 120 lbs
23: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
24: Class A refrigerants are considered
- flammable
- toxic
- non-toxic
- non-flammable
25: 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