Plumbing Symbols and Standards Quiz

What symbol is commonly used in plumbing diagrams to represent a water closet (toilet)?

• WC

• T

• S

• C

In plumbing, which of the following is the correct pipe symbol for a drain?

• Circle

• Square

• Triangle

• Horizontal Line

According to most plumbing codes, what is the minimum diameter for a residential drainpipe?

• 1 inch

• 1.5 inches

• 2 inches

• 3 inches

Which type of fitting is used to change the direction of a pipeline either 90° or 45°?

• Coupling

• Elbow

• Tee

• Reducer

Which of these materials is most used for water supply piping in modern residential buildings?

• Copper

• Lead

• Cast Iron

• PVC (Polyvinyl Chloride)