Topics: ASHRAE/CMR
1: What kind of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Stainless Steel
- Aluminum
2: What is an example of institutional occupancy?
- Shopping mall
- Hospital
- Football stadium
- Dorms
3: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
4: What type of relief valve is used on a CO2 system?
- gate valve
- rupture disc
- fusible plug
- glove disc
5: How many refrigerant classifications are there for flammability?
- 2
- 3
- 1
- 7
6: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
7: Refrigerant restricted in 2004 but used for transition for decades:
- R-11
- R-123
- R-134A
- R-22
8: 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
9: How many different groups of refrigerants are there?
- 7
- 15
- 3
- 11
10: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Stainless steel
- Copper
11: 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
12: The color code of a tank of ammonia is
- white
- lavender
- silver
- light green
13: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
14: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-134A
- R-22
- R-12
15: How many gallons of water do you need per pound of ammonia?
- 50
- 10
- 100
- 1
16: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 50
- 22
- 25
17: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 10
- 15
18: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- HFC
- Halon
19: What would be the classification of a church?
- Place of assembly
- Large mercantile
- Industrial
- Institutional
20: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 6.6 lbs
- 44 lbs
21: What is not a requirement of a class T machine room?
- automatic ventilation
- self-closing doors
- tight fitting doors
- fire hose connection to the building fire protection system
22: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
23: What pipe can not be used for refrigeration?
- M
- K
- N
- L
24: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per hour
- pounds of air per minute
25: Pipe identification labels are required when the system contains more than
- 65 lbs
- 120 lbs
- 55 lbs
- 110 lbs