Topics: ASHRAE/CMR
1: 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
- high side of the system
- the liquid side of the system
- low side of the system
2: What is the refrigerant chlorodifluoromethane?
- R-22
- R-134a
- R-123
- R-12
3: A professional or office building would be considered what type of occupancy?
- commercial
- mercantile
- business
- public assembly
4: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Temperature limiter device
- T&P device
- Relief valve
- Circuit Breaker
5: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 100%
- 80%
- 90%
6: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices or fusible plugs
7: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
- explosion precautions must be taken
8: How many refrigerant classifications are there for flammability?
- 3
- 1
- 2
- 7
9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 55 lbs
- 500 lbs
- 330 lbs
10: 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
11: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class B machinery room
- Class A machinery room
- Class M machinery room
12: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Ducted and sealed
- Welded and seamed.
13: What would be the classification for Stop & Shop grocery store?
- Instituional
- Place of assembly
- Industrial
- Large mercantile
14: How many groups of refrigerants are there?
- 7
- 5
- 3
- 1
15: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
16: What refrigerant is an inorganic compound?
- R-410A
- R-22
- Ammonia
- R-132A
17: The color code of a tank of ammonia is
- silver
- white
- light green
- lavender
18: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 5.5
- 3.0
- 2.0
19: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
20: Liquid level gauges must be provided with what?
- A relief valve
- A low level mark
- A red line
- Automatic shut-offs
21: Who is permitted to access a refrigeration machine room?
- Contractors only
- Anyone, it's a completely safe area
- Any employee
- Authorized persons only
22: Which refrigerant class listed below is the most flammable?
- C3
- B2
- A2
- A3
23: Class 3 refrigerants are
- toxic
- non-toxic
- non-flammable
- highly flammable
24: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- OSHA
- Department of Energy
25: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False