Topics: ASHRAE/CMR
1: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-134A
- R-11
2: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
3: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
4: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
5: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
6: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
7: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- mixed occupancy
8: Pressure vessels having an inside diameter of 6” or less shall be protected by
- 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
- a pressure relief device
9: 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
10: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
11: Ammonia is under what safety classification?
- B3
- A3
- B2
- B1
12: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Circuit Breaker
- T&P device
- Relief valve
- Temperature limiter device
13: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Add refrigerant
- Have it inspected
- Document the superheat and subcooling reading
14: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
15: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
16: What is Trichlorotrifluoromethane?
- R-12
- R-11
- R-113
- R-13
17: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 30'
- 25'
- 15'
18: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
19: What is the refrigerant dichlorodifluoromethane?
- R-134A
- R-22
- R-123
- R-12
20: What refrigerant is an inorganic compound?
- R-410A
- R-132A
- R-22
- Ammonia
21: A class B2 refrigerant is considered
- non-toxic and non-flammable
- non-toxic and highly flammable
- toxic and somewhat flammable
- toxic and non-flammable
22: What is not a requirement of a Class T machine room?
- Tight fitting doors
- Automatic ventilation
- Self-closing doors
- Fire hose connected to the building fire protection system.
23: 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
24: Class A refrigerants are considered
- toxic
- non-flammable
- non-toxic
- flammable
25: A positive displacement compressor is
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI