Topics: ASHRAE/CMR
1: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 cubic feet or more
- 15 square feet or less
- 3 cubic feet or more
2: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Brass
- Copper tubing
3: 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
4: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 18"
- 24"
- 12"
5: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
7: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- Yes, Under certain condidtions
- When mixed with R-718
8: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 6.6 lbs
- 13.9 lbs
- 44 lbs
9: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 3/32"
- 1/8"
- 5/16"
10: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
11: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
- OSHA
12: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 18
- 48
- 24
13: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Pressurized
- Inspected
- Insulated
14: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
15: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-2
- B-1
- A-1
16: Ammonia belongs to Group
- A-2
- B-2
- B-1
- A-1
17: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
18: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 80%
- 75%
19: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
20: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
21: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
22: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 50
- 22
- 33
23: R-11 belongs to Group
- B-3
- A-1
- A-2
- B-1
24: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
25: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.T
- D.O.D