Topics: ASHRAE/CMR
1: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
2: 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
3: Which refrigerant replaced R-12?
- R-134A
- R-407A
- R-410A
- R-22
4: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
5: A movie theater would be considered a
- mixed occupancy
- institutional occupancy
- commercial occupancy
- public assembly occupancy
6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
7: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 660 lbs
- 55 lbs
8: Liquid level gauges must be provided with what?
- A red line
- A relief valve
- A low level mark
- Automatic shut-offs
9: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 50
- 25
10: Halogen refrigerants are corrosive to which type of metal?
- black iron
- magnesium
- stainless steel
- copper
11: Can ammonia be used on domestic system?
- no, unless there is proper ventilation system installed
- yes
- yes, for systems under 10 tons
- no
12: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
13: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
14: Machinery rooms must be vented to ______?
- neutralizing tank
- basement
- outdoors
- unoccupied spaces
15: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- business occupancy
- public assembly occupancy.
- mercantile occupancy
16: How many refrigerant classifications are there for toxicity?
- 2
- 3
- 1
- 5
17: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- HFC
- CCFCM
18: How many gallons of water per pound of ammonia do you need?
- 15
- 20
- 5
- 1
19: What is an example of institutional occupancy?
- Hospital
- Shopping mall
- Football stadium
- Dorms
20: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
21: Class 3 refrigerants are
- non-flammable
- highly flammable
- toxic
- non-toxic
22: 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
23: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Copper
- Stainless Steel
24: R-717 is
- ammonia
- trichloromethane
- water
- carbon dioxide
25: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- shall be prohibited