Topics: ASHRAE/CMR
1: Class A refrigerants are considered
- flammable
- non-flammable
- non-toxic
- toxic
2: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1
- 1.5
- 2.2
- 1.2
3: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- commercial occupancy
- mercantile occupancy
4: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Aluminum
- Copper
5: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
6: What is an example of institutional occupancy?
- Hospital
- Football stadium
- Dorms
- Shopping mall
7: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Never can be allowed
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
8: 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
9: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 33
- 50
- 22
10: When an inspection is needed, how often must it be done?
- every 36 months
- every 24 months
- annually
- every 18 months
11: R-11 belongs to Group
- A-2
- A-1
- B-3
- B-1
12: What pipe can not be used for refrigeration?
- K
- L
- N
- M
13: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Copper
- Aluminum
- PVC
14: What refrigerant were phased out in 2004?
- R-11
- R-12
- R-134a
- R-22
15: 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
16: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-12
- R-11
17: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Copper
- Aluminum
- Zinc
18: Ammonia belongs to Group
- B-2
- B-1
- A-2
- A-1
19: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- 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 a system highly likely to leak from a failed connection or component of such system
20: Which refrigerant class listed below is the most flammable?
- C-3
- B-2
- A-3
- A-1
21: What section of ASHRAE-15 governs pressure vessels?
- Section 7 ASHRAE-15 ASME VIII fired
- Section 9 ASHRAE-15 ASME VIII unfired
- OSHA
- Section 6 ASHRAE-34 ASME VIII unfired
22: NH3 is
- lithium bromide
- ammonia
- R-508A
- R-718
23: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Pressurized
- Insulated
- Leak tested
24: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
25: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.