FREE Master Plumber Questions And Answers


What size of an unobstructed exit opening is required for a standard shower when a shower door is installed?

Correct! Wrong!

For a shower door to be fitted on a conventional shower, there must be a minimum of 22 inches of clear space to exit.

Which of the following requires a plumbing permit to be replaced?

Correct! Wrong!

Any plumbing fixture that is being replaced directly, with the exception of a water heater, does not require a plumbing permit. However, a permission is necessary if a fixture's placement is modified. In other words, you don't need a permit to remove a toilet and install a new one. However, a permit is necessary if you move the closest flange in any way. For all plumbing fixtures, this is true.

With the exception of: All pipes used in plumbing applications must be marked with:

Correct! Wrong!

Brand names, psi ratings, and nominal pipe sizes are necessary. Some pipe manufacturers offer measurement in one foot increments when rolls of pipe are 100' or greater, but do not indicate increments on joints of 21', 20', or less.

Which of the following factors determines the license requirements:

Correct! Wrong!

The conditions for licensing are set by the authority with jurisdiction. State Plumbing Boards set the standards and conduct the licensing exams for eligible candidates. Plumbing inspectors carry out the AHJ's code enforcement.

Which of the following methods can be used to check for leaks in a DWV system?

Correct! Wrong!

Modern DWV systems frequently undergo air testing. The most used testing method in the past was water. Smoke can be utilized to reveal the location of a leak when it is difficult to locate it. Smoke is not the main test technique. The preferred testing medium is air. A minimum of 15 minutes must pass during the testing of a DWV system. Ten pounds per square inch (PSI) must be the minimum test pressure. One riser that is at least ten feet above the main plumbing system is required if just underground plumbing is being checked.

How tall would a handicap toilet likely be?

Correct! Wrong!

There are handicap toilets with heights of 16, 18, and 20 inches available. The most typical height for a handicap toilet is 18 inches.

Which of the following connections to a sanitary drainage system is seen to be the most effective?

Correct! Wrong!

An indirect wastepipe is thought to be better protected from back siphonage by an air gap than by an air break. An air break carries a higher risk of a backflow due to the installation process. It is possible for the sanitary drain to become clogged and back up since air breaches have discharge piping entering a receptor. If this happens, contaminated waste may return to the indirect waste fixture. When an air gap is being employed, this is not possible.

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