403A Blueprint Reading

Question 1

On a Canadian construction blueprint, what does the abbreviation 'O.C.' stand for?

Accepted Answer

On centre

Answer

Outside corner

Answer

Open ceiling

Answer

Over concrete

Question 2

What type of line on a blueprint indicates a hidden or concealed feature below the surface?

Accepted Answer

Dashed line (hidden line)

Answer

Centre line

Answer

Break line

Answer

Section line

Question 3

On a floor plan drawn at a scale of 1:50, how long would a 5-metre wall appear on the drawing?

Accepted Answer

100 mm

Answer

50 mm

Answer

200 mm

Answer

500 mm

Question 4

What does a section view on a blueprint show?

Accepted Answer

An imaginary cut through the building to reveal interior construction

Answer

The building from above

Answer

The exterior elevation from one side

Answer

The site layout and grading plan

Question 5

In Canadian blueprint conventions, what does the symbol of a triangle with a number inside typically represent?

Accepted Answer

An elevation reference or detail marker

Answer

A column grid reference

Answer

A room number

Answer

A fire rating designation

Question 6

What information is typically found in the title block of a construction drawing?

Accepted Answer

Project name, drawing number, scale, date, and designer information

Answer

Material specifications and costs

Answer

Structural load calculations

Answer

Municipal zoning requirements