Question 1
According to the International Plumbing Code (IPC) as adopted by DC, what is the minimum size for a building sewer?
Correct Answer:
3 inches
Question 2
Under DCRA regulations, what is the minimum slope required for a 3-inch horizontal drainage pipe?
Correct Answer:
1/8 inch per foot
Question 3
What is the DFU value for a residential water closet (1.6 gpf) under the IPC?
Correct Answer:
3 DFU
Question 4
What is the maximum distance between cleanouts on a horizontal drainage pipe per the IPC?
Correct Answer:
100 feet
Question 5
In DC, what type of backflow preventer is required for a high-hazard cross-connection?
Correct Answer:
Reduced pressure zone (RPZ) assembly
Question 1 of 100
Exam overview

About this Exam

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

More details

Additional Information

DC Plumber Practice Questions - District of Columbia Journeyman Plumber License Exam

This practice set contains 100 questions from the matching question bank and focuses on minimum, water, pipe, size, and maximum. 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.

Quiz information

Frequently Asked Questions

There are currently 100 available practice questions in this quiz.
No fixed duration is currently configured for this quiz.
Question explanations are included where they are available in the quiz content, helping you review the reasoning after answering.
Yes. You can retake the practice test again as you continue studying during your available access period.
After your access is confirmed, you can continue into the complete practice exam from this quiz flow.
Unless explicitly stated otherwise, this page provides independent practice material for study and exam preparation and is not the official examination itself.
Keep studying

Related Questions