Topics: ASHRAE/CMR
1: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
2: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Stop valve
- Foot valve
- Moisture indicator
3: A declaration test is needed when the system contains more than
- 65 lbs
- 55 lbs
- 110 lbs
- 120 lbs
4: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
5: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-407A
- R-134A
6: B3 refrigerants are considered
- toxic but non-flammable
- toxic and highly flammable
- non-toxic but non-flammable
- non-toxic but flammable
7: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
8: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Copper
- Aluminum
- Stainless steel
9: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
10: R-123 belongs to Group
- B-3
- B-2
- B-1
- A-3
11: No open flames are allowed in the machinery room unless?
- Only when combustion air is provided from outside of the machinery room
- Approved by the installing contractor
- Never can be allowed
- Approved by the authorized person
12: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Nickel
- Zinc
- Copper
13: NH3 is
- lithium bromide
- R-718
- ammonia
- R-508A
14: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
15: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 550 lbs
- 660 lbs
- 55 lbs
16: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 600F
- 800F
- 700F
17: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Place of assembly
- Instituional
18: What refrigerant is an inorganic compound?
- Ammonia
- R-132A
- R-22
- R-410A
19: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
20: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
21: 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
22: 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
23: 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
24: When an inspection is needed, how often must it be done?
- every 18 months
- every 24 months
- annually
- every 36 months
25: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more