Topics: ASHRAE/CMR
1: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
2: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 90%
- 100%
- 80%
3: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- public assembly occupancy
- institutional occupancy
- mixed occupancy
4: A movie theater would be considered a
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- mixed occupancy
5: 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
6: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100
- 10,000
- 100,000
7: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's water
- Because it's cheap
8: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- redifential
- industrial
9: Ammonia is under what safety classification?
- A3
- B2
- B3
- B1
10: What would be the classification of a church?
- Place of assembly
- Institutional
- Large mercantile
- Industrial
11: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 1000F
- 600F
12: Refrigerants shall be classified by
- requirements for commercial, industrial, and residential occupancies
- maximum permissible quantities of each group
- color codes
- toxicity and flammability
13: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
14: Who approves containers for refrigerants?
- E.P.A
- D.O.D
- D.O.E
- D.O.T
15: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 660 lbs
- 55 lbs
- 330 lbs
16: When air is ducted through a machine room that services occupied space, What must be done?
- Welded and seamed.
- Ducted and sealed
- Flanged and gasketed
- Insulated and cross broke
17: A class B1 refrigerant is considered
- toxic but non-flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
18: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
19: Ammonia can come in contact with _______ ?
- Brass
- Aluminum
- Copper tubing
- Copper
20: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the vapor side of the system
- the liquid side of the system
- high side of the system
- low side of the system
21: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Copper
- Aluminum
22: What would be the classification for Stop & Shop grocery store?
- Instituional
- Place of assembly
- Industrial
- Large mercantile
23: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
24: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-123
- R-11
- R-134A
25: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- you can't change refrigerants
- place sign, check for leaks, insulate