Topics: ASHRAE/CMR
1: 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
2: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 75
- 15
3: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
4: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 10
- 18
- 24
5: 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
6: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
7: Most CFC's are
- inert but toxic
- inert
- flammable
- toxic
8: Pipe identification labels are required when the system contains more than
- 65 lbs
- 110 lbs
- 55 lbs
- 120 lbs
9: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
10: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Self-closing doors
- Tight fitting doors
- Fire hose connected to the building fire protection system.
11: Machinery rooms must be vented to ______?
- outdoors
- neutralizing tank
- unoccupied spaces
- basement
12: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on the oil used
- Based on best case Fractionation
- Blends don't have to be classified
13: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
14: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
15: Can you use Ammonia in industrial applications?
- Yes, always
- When mixed with R-718
- Yes, Under certain condidtions
- No, never
16: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 25
- 50
- 66
17: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted on the compressor shell or electrical panel at the unit
18: What happens after your initial inspection of a pressure vessel?
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved
- Notify the AHJ to let them know that the system been inspected
- Inspector leaves a metal tag with a certification listed on it
19: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
20: High pressure controls should be set no higher than
- 10% of set point
- 80% of set point
- 90% of set point
- 25% of set point
21: The Board of Boilers adopts by reference
- MSCA Code
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
22: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- regularly
- annually
- quarterly
- bi-annually
23: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Zinc
- Nickel
- Copper
24: _____ and its alloys are suitable for use with ammonia systems.
- Zinc
- Aluminum
- Copper
- Magnesium
25: 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