Question 1
Which agency oversees plumber licensing in Washington State?
Correct Answer:
Washington Department of Labor & Industries (L&I)
Question 2
Washington State's plumbing code is based on which model code?
Correct Answer:
Uniform Plumbing Code (UPC) 2015 with Washington amendments
Question 3
What is the passing score required on the Washington journeyman plumber exam?
Correct Answer:
70%
Question 4
Per the UPC, what is the minimum slope for a 4-inch horizontal drainage pipe?
Correct Answer:
1/8 inch per foot
Question 5
Per the UPC, what is the DFU (Drainage Fixture Unit) value for a water closet (flush tank type)?
Correct Answer:
4 DFU
Question 1
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About this Exam

Prepare with the WA Plumber Practice Questions - Washington Journeyman Plumber License Exam practice quiz. This question bank includes 100 questions covering minimum, water, pipe, maximum, and size. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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WA Plumber Practice Questions - Washington Journeyman Plumber License Exam

This practice set contains 100 questions from the matching question bank and focuses on minimum, water, pipe, maximum, and size. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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