Topics: ASHRAE/CMR
1: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
2: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
3: Machinery rooms must be vented to ______?
- unoccupied spaces
- neutralizing tank
- outdoors
- basement
4: A declaration test is needed when the system contains more than
- 65 lbs
- 110 lbs
- 120 lbs
- 55 lbs
5: 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.
- 80
- 110
- 100
- 90
6: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Fusible plug
- Gate valve
- Glove valve
7: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- .5 CFM
- 20 CFM
- 5 CFM
8: Pipe identification labels are required when the system contains more than
- 120 lbs
- 55 lbs
- 110 lbs
- 65 lbs
9: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
10: What must be done to refrigerant pipes before being buried?
- Encased
- Coated
- Leaked checked
- Certified
11: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 25'
- 15'
- 30'
12: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- between the compressor and reciever
- on top of the condensor
- between the compressor and oil separator
13: _____ and its alloys are suitable for use with ammonia systems.
- Aluminum
- Magnesium
- Zinc
- Copper
14: How many different groups of refrigerants are there?
- 11
- 3
- 15
- 7
15: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 22
- 50
- 18
16: How many refrigerant classifications are there for toxicity?
- 2
- 3
- 5
- 1
17: Relief valves are rated in
- pounds of air per minute
- gallons of water per hour
- gallons of water per minute
- pounds of air per hour
18: 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
19: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 660 lbs
- 55 lbs
- 330 lbs.
20: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
21: 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
22: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
23: What type of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Stainless steel
- Magnesium alloy
24: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
25: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above