PC Blueprint Reading & Interpretation 3

Question 1

On plumbing blueprints, what does the symbol 'HB' typically denote?

Accepted Answer

Hose Bibb

Answer

HB stands for Hose Bibb, which is an outdoor faucet with a threaded end for attaching a garden hose.

Question 2

A plumbing plan shows pipe with the notation '2" PVC DWV.' What does DWV stand for?

Accepted Answer

Drain Waste Vent

Answer

DWV stands for Drain Waste Vent, describing PVC pipe designed for drainage, waste, and vent applications.

Question 3

What does a 'section view' on a plumbing blueprint show that a floor plan cannot?

Accepted Answer

Interior details of walls, floors, and vertical pipe routing

Answer

A section view cuts through the building to reveal interior vertical details, showing how pipes route through walls, floors, and structural elements.

Question 4

On a blueprint, a pipe labeled '4" CI' refers to what material?

Accepted Answer

Cast Iron pipe

Answer

CI is the standard abbreviation for Cast Iron pipe, commonly used for soil and drain lines.

Question 5

When a plumbing drawing shows 'INV EL 98.50,' what does this notation indicate?

Accepted Answer

The invert elevation is 98.50 feet above datum

Answer

INV EL refers to Invert Elevation, the elevation of the inside bottom of the pipe measured from a reference datum.

(PC) Plumber Certification Practice Test