What is the standard size of a residential water supply pipe?

• 1 inch

• 3/4 inch

• 1/2 inch

• 1/4 inch

Which material is commonly used for drain pipes in modern plumbing?

• Copper

• PVC

• Galvanized steel

• Aluminum

What does 'PSI' stand for in plumbing?

• Pressure System Indicator

• Pounds Square Inch

• Plumbing System Integrity

• Pipe Stress Index

What tool is used to cut copper pipes?

• Pipe wrench

• Hacksaw

• Tubing cutter

• Plier

Which part of a faucet prevents backflow?

• Spout

• Aerator

• Check valve

• Handle

What is the function of a ball valve?

• Control water temperature

• Shut off water flow

• Regulate water pressure

• Filter impurities

Which fitting connects pipes of different diameters?

• Elbow

• Tee

• Reducer

• Coupling

The of kind fitting use to connect fixed pipe and fixtures is a _____

• Wye fi bing

• Coupling

• Union fitting

• Reducer

What is the maximum allowable lead content in drinking water pipes?

• 8%

• 5%

• 2.5%

• 0.25%

Why is a P-trap installed under sinks?

• To prevent water overflow

• To trap debris

• To block sewer gases

• To increase water flow