403A Blueprint Reading & Layout

Question 1

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

Accepted Answer

On Centre

Answer

Outside Corner

Answer

Open Circuit

Answer

Over Clearance

Question 2

Which scale is most commonly used for residential floor plans in Canada?

Accepted Answer

1:50

Answer

1:100

Answer

1:200

Answer

1:500

Question 3

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

Accepted Answer

Dashed line

Answer

Solid heavy line

Answer

Centre line

Answer

Break line

Question 4

When reading a site plan, the benchmark elevation is marked as 100.000 m. A finished floor elevation is shown as 100.450 m. How high above the benchmark is the finished floor?

Accepted Answer

450 mm

Answer

45 mm

Answer

4.5 m

Answer

4500 mm

Question 5

What does a section view on a drawing show?

Accepted Answer

An interior cut-away view of a building component

Answer

The roof plan from above

Answer

The exterior elevation of a wall

Answer

The property boundary lines

Question 6

On a drawing, what does the symbol with a circle and an arrow pointing to a wall indicate?

Accepted Answer

A section cut reference

Answer

A door swing

Answer

A window opening

Answer

A plumbing fixture