Practice test

Plumbing Practice Exam 10

Plumbing practice exam 10 intermediate tier: service sizing, expansion control, backwater valves, transitions, and code. Scored with explanations.

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Question 1

1

A duplex shares one 1 inch service. Each unit has a full bath, kitchen, and laundry. Why might the service need upsizing?

Question 2

2

Why is it incorrect to size a water heater's relief discharge using the smallest convenient tubing on hand?

Question 3

3

A building's measured static pressure is 95 psi and several supply lines have failed. Beyond a PRV, what must be added if the PRV creates a closed system?

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