Topics: ASHRAE/CMR
1: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- When mixed with R-718
- No, never
- Yes, always
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: What is Trichlorotrifluoromethane?
- R-12
- R-13
- R-113
- R-11
4: What would be the classification of a church?
- Place of assembly
- Institutional
- Large mercantile
- Industrial
5: What does “ultimate strength” mean?
- Design strength of the vessel or piping in a refrigeration system
- Stress at which rupture will occur
- Highest or design pressure allowed inside a machinery room
- None of the above
6: B3 refrigerants are considered
- toxic and highly flammable
- non-toxic but non-flammable
- toxic but non-flammable
- non-toxic but flammable
7: What would be the classification of a prison?
- Institutional
- Place of assembly
- Industrial
- Large mercantile
8: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- breaker panel in
9: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
- A code violation
- An escape route
10: R-123 belongs to Group
- B-1
- B-2
- B-3
- A-3
11: How many gallons of water do you need per pound of ammonia?
- 1
- 10
- 100
- 50
12: What is R-611’s ASHRAE Safety Code?
- B2
- B3
- C3
- A2
13: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.00'
- 7.25'
- 9.00'
- 8'4"
14: 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
15: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
16: 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
17: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 75%
- 99%
- 90%
18: 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
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: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Insulated and installed in a pipe duct (Encased)
- Leak checked
- Classifed
21: Joints in refrigeration piping must be _____ before being covered?
- Pressurized
- Leak tested
- Insulated
- Inspected
22: What is R-290’s ASHRAE safety code?
- B1
- A2
- A3
- B2
23: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
24: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 1,000
- 110
- 6.6
25: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K