Topics: ASHRAE/CMR
1: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 3
- 1
- 5
2: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
3: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
4: What kind of material can't be used on the outlet of a relief valve?
- Aluminum
- Copper
- Stainless Steel
- PVC
5: What type of relief valve is used on a CO2 system?
- gate valve
- fusible plug
- glove disc
- rupture disc
6: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- the vapor side of the system
- the liquid side of the system
- high side of the system
7: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- explosion precautions must be taken
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
8: What is R-22?
- CCFCM
- HFC
- Chlorofluoromethane
- Chlorodifluoromethane
9: A hotel is considered a _______ occupancy.
- institutional
- residential
- commercial
- mercantile
10: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Copper
- Stainless steel
11: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 18
- 50
- 22
12: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
13: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
14: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
15: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
16: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
17: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-134A
- R-11
18: 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
19: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- There is no minimum for relief valve and windows.
- At least 30'
- At least 20'
20: Where must a refrigeration contractor's license number be displayed?
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
22: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
23: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.2
- 1
- 1.5
- 2.2
24: The color code of a tank of ammonia is
- silver
- white
- lavender
- light green
25: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 24
- 10
- 18