Topics: ASHRAE/CMR
1: A relief valve discharge capacity is rated in
- PSIA
- PSIG
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
2: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Temperature range and hazardousness
- Flammability and temperature range
- Flammability and toxicity
3: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- public assembly occupancy.
- mercantile occupancy
- business occupancy
4: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
5: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
6: When should a relief valve start to function?
- 10 psi before it's set pressure
- Before the purge station discharges
- Two times it's working pressure
- At it's set pressure
7: 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
8: Class T machine room
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
9: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- T&P device
- Circuit Breaker
- Temperature limiter device
10: All serviceable components of a refrigeration system shall be provided with
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- service manuals
11: 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
12: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Certified
13: What is R-22?
- Chlorodifluoromethane
- HFC
- CCFCM
- Chlorofluoromethane
14: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-407A
- R-134A
15: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- phosgene gas sening
- A group sensing
16: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
17: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 18"
- 36"
- 12"
18: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- place sign, check for leaks, insulate
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
19: The gauge thickness required on a CO2 tank construction is
- 1/8"
- 3/32"
- 1/16"
- 5/16"
20: 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)
- institutional occupancy
- illegal occupancy
- public assembly occupancy
- commercial occupancy
21: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
22: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 15'
- 30'
- 20'
23: R-123 belongs to Group
- B-1
- B-3
- B-2
- A-3
24: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 3.0
- 2.5
- 5.5
25: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.D
- D.O.T