Topics: ASHRAE/CMR
1: R-717 is
- ammonia
- trichloromethane
- water
- carbon dioxide
2: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall have a pressure limiting device installed on the high side of the system
- shall have a pressure limiting device and a pressure relief valve installed
- shall be inspected by the Boiler of Inspectors bi-annually
3: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
4: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Copper
- Aluminum
- Stainless steel
5: The Department that certifies the transportation of refrigerant is the
- EPA
- EPO
- RSES
- DOT
6: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the return air ducted system
- the outdoors
- the mechanical room housing the refrigeration system
7: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
8: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 10
- 18
- 15
9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 550 lbs
- 660 lbs
- 55 lbs
10: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When there are sprinklers above
- When its white
- When it's used as part of a supply or return air system
11: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
12: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
13: Which refrigerant class listed below is the most flammable?
- A-3
- B-2
- A-1
- C-3
14: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
15: What would be the classification of a prison?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
16: A movie theater would be considered a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- institutional occupancy
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 500 lbs
- 55 lbs
- 330 lbs
18: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with R-11
- Flush with RX-11
- Flush with R-718
- Flush with ammonia
19: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.5
- 3.0
- 2.0
20: R-22 falls under which safety classification?
- B-2
- A-2
- A-1
- B-1
21: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-1
- A-2
- B-1
- B-2
22: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
23: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and temperature range
- Flammability and toxicity
- Weight and color
24: What is Trichlorotrifluoromethane?
- R-11
- R-113
- R-13
- R-12
25: 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