Topics: ASHRAE/CMR
1: A class B1 refrigerant is considered
- non-toxic and non-flammable
- toxic and somewhat flammable
- toxic but non-flammable
- non-toxic but highly flammable
2: 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
3: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 90%
- 100%
- 75%
4: How are refrigerant blends classified?
- Based on worst case fractionation
- Blends don't have to be classified
- Based on the oil used
- Based on best case Fractionation
5: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
7: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 1000F
- 700F
- 600F
8: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with ammonia
- Flush with RX-11
- Flush with R-718
- Flush with R-11
9: What happens after your initial inspection of a pressure vessel?
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
10: 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
11: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
12: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- high limit control
- pressure relief device
- zone valve
13: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 660 lbs
- 55 lbs
- 550 lbs
15: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- self-closing doors
- automatic ventilation
- tight fitting doors
16: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
17: 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
18: What would be the classification of a church?
- Large mercantile
- Institutional
- Industrial
- Place of assembly
19: Class 3 refrigerants are
- toxic
- highly flammable
- non-flammable
- non-toxic
20: R-123 belongs to Group
- B-1
- B-2
- A-3
- B-3
21: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
22: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
23: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
24: 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
25: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Zinc
- Magnesium
- Aluminum