TN CMC-A Plumbing Practice Questions - Tennessee Plumbing (CMC-A) Contractor Examination Exam - TN CMC-A Plumbing Practice Questions - Tennessee Plumbing (CMC-A) Contractor Examination Exam

Question 1

Per the 2021 International Plumbing Code, the building drain becomes the building sewer at which point?

At the first cleanout inside the foundation wall 30 inches in developed length of pipe beyond the exterior walls of the building 10 feet beyond the exterior walls of the building At the public sewer tap, regardless of developed length

Correct Answer:

30 inches in developed length of pipe beyond the exterior walls of the building

Question 2

A drainage fixture unit (DFU) as used in the 2021 IPC is best described as which of the following?

The measured gallons per minute discharged by a fixture at peak flow A relative load value assigned to a fixture to estimate probable drainage load on a pipe The trap diameter of the fixture expressed as a whole number The number of occupants that may use one public water closet

Correct Answer:

A relative load value assigned to a fixture to estimate probable drainage load on a pipe

Question 3

The primary purpose of a fixture trap is to do which of the following?

Increase the velocity of waste so solids do not settle Provide a water seal that prevents sewer gas from entering the building Strain solids so they never enter the drainage piping Serve as the required vent for the fixture drain

Correct Answer:

Provide a water seal that prevents sewer gas from entering the building

Question 4

Developed length of piping, as used for IPC vent and water-supply calculations, is measured in which manner?

The straight-line horizontal distance between the two endpoints The length along the pipe centerline, including fittings, between the two points considered The vertical rise only, ignoring horizontal offsets The sum of fitting equivalent lengths only, ignoring the pipe itself

Correct Answer:

The length along the pipe centerline, including fittings, between the two points considered

Question 5

A cross-connection in a potable water system is best defined as which of the following?

Any tee that joins a hot-water branch to a cold-water branch at a mixing valve An actual or potential connection between potable water and a source of contamination or pollution A dielectric union between dissimilar metals A water-service pipe that shares a trench with a building drain of approved material

Correct Answer:

An actual or potential connection between potable water and a source of contamination or pollution

Exam overview

About this Exam

Prepare with the TN CMC-A Plumbing Practice Questions - Tennessee Plumbing (CMC-A) Contractor Examination Exam practice quiz. This question bank includes 100 questions covering inch, section, water, feet, and vent. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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TN CMC-A Plumbing Practice Questions - Tennessee Plumbing (CMC-A) Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on inch, section, water, feet, and vent. 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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TN CMC-A Plumbing Practice Questions - Tennessee Plumbing (CMC-A) Contractor Examination Exam

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