Topics: ASHRAE/CMR
1: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless steel
- Aluminum
- Copper
2: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
- Flammability and temperature range
3: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
4: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Pressurized
- Inspected
- Insulated
5: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
6: All serviceable components of a refrigeration system shall be provided with
- safe access
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
7: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
8: When an inspection is needed, how often must it be done?
- every 24 months
- every 36 months
- every 18 months
- annually
9: 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.
- “UM” and “UV”
- “UL”
- “UV”
- “U” or “UM”
10: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- critical pressure
- high pressure
- design pressure
12: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
13: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
14: The color code of a tank of ammonia is
- white
- light green
- silver
- lavender
15: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- on top of the condensor
- between the compressor and oil separator
- between the compressor and the stop valve
16: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Have it inspected
17: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 350
- 250
- 400
18: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Fusible plug
- Glove valve
- Gate valve
19: What type of material can't be used on the outlet of a relief valve?
- PVC
- Magnesium alloy
- Stainless steel
- Copper
20: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-123
- R-22
- R-12
21: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- higher
- the same
- lower
22: What refrigerant were phased out in 2004?
- R-134a
- R-11
- R-12
- R-22
23: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
24: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 75
- 55
- 50
25: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
- Insulated and cross broke