308A Blueprint Reading for Sheet Metal 2

Question 1

What does a 'revision cloud' on a blueprint indicate?

Accepted Answer

An area of the drawing that has been changed or modified from the previous version

Answer

A weather symbol

Answer

A decorative border

Answer

An area that is not to scale

Question 2

On an HVAC plan drawing, what does a rectangle with an 'X' through it typically represent?

Accepted Answer

A ceiling diffuser or supply air outlet

Answer

A fire extinguisher location

Answer

A structural column

Answer

A return air grille

Question 3

What is an 'isometric drawing' and how is it useful for sheet metal work?

Accepted Answer

A 3D pictorial drawing showing three sides of an object at equal angles, useful for visualizing duct routing and fittings

Answer

A flat 2D drawing

Answer

A drawing at double scale

Answer

A cross-section view

Question 4

What does the abbreviation 'GA' or 'ga' represent on a sheet metal drawing?

Accepted Answer

Gauge — the thickness of the sheet metal

Answer

Galvanic action

Answer

Galvanized area

Answer

General arrangement

Question 5

What is the purpose of a 'material list' or 'bill of materials' (BOM) on a sheet metal drawing set?

Accepted Answer

To itemize all materials, quantities, sizes, and specifications needed to fabricate the job

Answer

To list the workers assigned to the project

Answer

To show the construction schedule

Answer

To list inspection requirements

Question 6

What does a 'break line' (zigzag line) indicate on a sheet metal drawing?

Accepted Answer

That a portion of the object has been removed to save space on the drawing, and the actual length is longer

Answer

A weld location

Answer

A bend line

Answer

A section cut