Topics: ASHRAE/CMR
1: What kind of material can't be used on the outlet of a relief valve?
- Aluminum
- PVC
- Stainless Steel
- Copper
2: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Welded and seamed.
- Ducted and sealed
3: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- safe access
- service manuals
4: 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
5: What is not a requirement of a class T machine room?
- tight fitting doors
- automatic ventilation
- fire hose connection to the building fire protection system
- self-closing doors
6: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 75%
- 100%
7: 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
8: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
9: Ammonia is under what safety classification?
- B2
- B1
- B3
- A3
10: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Foot valve
- Muffler
- Stop valve
11: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
- a pressure relief device
12: B3 refrigerants are considered
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but flammable
- non-toxic but non-flammable
13: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
14: What type of relief valve is used on a CO2 system?
- rupture disc
- fusible plug
- glove disc
- gate valve
15: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Copper tubing
- Brass
16: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Certified
- Insulated and installed in a pipe duct (Encased)
- Leak checked
17: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
- between the compressor and reciever
18: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
19: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
20: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
21: What is not a requirement of a Class T machine room?
- Fire hose connected to the building fire protection system.
- Automatic ventilation
- Self-closing doors
- Tight fitting doors
22: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-22
- R-11
23: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- PVC
- Magnesium alloy
- Copper
24: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- 10
- 15
- III
25: R-22 is considered a(n)
- CFC
- HFC
- HCFC
- HCFCH