Topics: ASHRAE/CMR
1: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
2: When an inspection is needed, how often must it be done?
- every 24 months
- every 18 months
- every 36 months
- annually
3: Which refrigerant class listed below is the most flammable?
- A-3
- C-3
- B-2
- A-1
4: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
5: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
6: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device and a pressure relief valve installed
- does not require a pressure-limiting device
7: 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
8: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 2.5, 3.0
- 6.6, 6.6
- 2.5, 2.5
- 3.0, 3.5
9: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 100
- 110
- 80
10: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
11: A class B1 refrigerant is considered
- non-toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- toxic but non-flammable
12: What section governs pressure vessels?
- OSHA
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
13: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- mercantile occupancy
- commercial occupancy
- public assembly occupancy.
14: 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
15: Who authorizes changes to the safety codes?
- Contractor who last serviced the system.
- Person in charge of the facility
- Board of Boilers
- Person who pulled the permit
16: Machinery rooms must be vented to ______?
- basement
- neutralizing tank
- unoccupied spaces
- outdoors
17: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted on the compressor shell or electrical panel at the unit
- shall be authorized by a notarized insurance company
- shall be posted and protected from dirt, water, and other elements
18: Which refrigerant replaced R-12?
- R-134A
- R-22
- R-410A
- R-407A
19: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
20: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
21: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
22: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
23: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- B-2
- A-2
24: The discharge relief valve is located
- between the compressor and reciever
- on top of the condensor
- between the compressor and the stop valve
- on the accumulator
25: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures