Topics: ASHRAE/CMR
1: B3 refrigerants are considered
- toxic and highly flammable
- non-toxic but flammable
- toxic but non-flammable
- non-toxic but non-flammable
2: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 44 lbs
- 13.9 lbs
- 6.6 lbs
- 22 lbs
3: What type refrigerant is NOT ozone depleting?
- HFC
- CFC
- Halon
- HCFC
4: Ammonia is under what safety classification?
- B3
- B1
- B2
- A3
5: A class A3 refrigerant is considered
- non-toxic but highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
6: R-11 belongs to Group
- B-1
- A-1
- B-3
- A-2
7: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UL”
- “UV”
- “UM” and “UV”
- “U” or “UM”
8: Which refrigerant class listed below is the most flammable?
- A3
- C3
- B2
- A2
9: 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
10: What refrigerant doesn't have to be classifted?
- R-717
- R-134a
- R-718
- R-711
11: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 90%
- 100%
- 80%
12: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
13: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
14: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
15: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- illegal occupancy
- public assembly occupancy
- commercial occupancy
- institutional occupancy
16: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 55 lbs
- 550 lbs
- 330 lbs.
17: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall be prohibited
18: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- no flames shall be permitted
- explosion precautions must be taken
- gas masks must be worn
19: What kind of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Aluminum
- Stainless Steel
20: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- Nothing must be done
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
21: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
- When there are sprinklers above
- When its white
22: What is not a requirement of a class T machine room?
- automatic ventilation
- fire hose connection to the building fire protection system
- self-closing doors
- tight fitting doors
23: What pipe can not be used for refrigeration?
- K
- N
- L
- M
24: When must refrigeration system covered by the code be inspected?
- Upon installation
- Not required
- Annually and when installed
- Annually
25: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Nickel
- Magnesium
- Zinc