Plumbing Materialch4 slides 1-10

What are the two processes used to manufacture plastic pipe and fittings?

• Machining and welding

• Casting and forging

• Extrusion and injection molding

• Sintering and compression molding

What is the purpose of an expansion loop in PEX plastic tubing?

• To connect multiple pieces of tubing

• To compensate for expansion and contraction due to temperature changes

• To increase the flow rate of water

• To prevent leaks in the tubing

Which of the following is not an application of plastic piping materials?

• Electrical wiring

• Fire sprinkler piping

• Hot and cold water distribution

• Drain, waste, and vent

What information is typically marked on plastic pipe?

• Country of origin, production date, and batch number

• Material composition, weight, and dimensions

• Installation instructions and maintenance guidelines

• Manufacturer name, pipe size, resin type, pressure rating, and more

Which fittings are used for sanitary drainage and vent piping?

• 90° elbow, tee, and coupling

• 45° wye, cap, and adapter

• Sanitary tee, closet flange, and trap

• Double long-radius T-Y, cleanout, and bushing

What is used to protect ABS DWV pipe at penetrations of fire-rated walls, floors, and ceilings?

• Fire-resistant caulk

• Steel plate protector

• Heat-resistant paint

• Concrete barrier

Which fittings are commonly used for hot and cold water distribution systems?

• 90° elbow, tee, and coupling

• Double long-radius T-Y, cleanout, and bushing

• 45° wye, cap, and adapter

• Compression fitting, 90° drop ear elbow, and union

What are PEX fittings used for?

• Fire sprinkler piping

• Electrical wiring

• Sanitary drainage and vent piping

• Water service piping and cold and hot water distribution piping

What is the purpose of a die adapter in the extrusion process of plastic pipe manufacturing?

• To connect the extruder to the mold cavity

• To control the flow rate of the molten plastic

• To cool the plastic after it is extruded

• To shape the plastic into the desired pipe size

What is the purpose of a feed throat in the injection molding process of plastic pipe manufacturing?

• To connect the extruder to the mold cavity

• To control the flow rate of the molten plastic

• To shape the plastic into the desired pipe size

• To cool the plastic after it is extruded