Topics: ASHRAE/CMR
1: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
2: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Automatic ventilation
3: Machinery rooms must be vented to ______?
- basement
- neutralizing tank
- unoccupied spaces
- outdoors
4: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Copper
- Zinc
- Magnesium
5: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- commercial occupancy
- mixed occupancy
- public assembly occupancy
6: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
7: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
8: 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.
- 90
- 80
- 100
- 110
9: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter an unoccupied 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 form a failed connection or component of such system
10: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Copper
- Aluminum
- Zinc
11: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
12: R-123 belongs to Group
- B-3
- B-1
- B-2
- A-3
13: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
14: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Copper tubing
- Brass
15: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-12
- R-113
- R-22
- R-11
16: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and temperature range
- Weight and color
- Flammability and toxicity
17: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Coated
- Certified
18: Relief valves are rated in
- pounds of air per minute
- gallons of water per minute
- pounds of air per hour
- gallons of water per hour
19: What does safe access mean?
- OSHA approved
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
- Locked doors
20: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
21: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 18
- 15
- 24
22: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
23: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 25' above grade
- At least 15' above grade
- At least 20' above grade
24: What refrigerant doesn't have to be classifted?
- R-717
- R-711
- R-718
- R-134a
25: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above