403A Blueprint Reading 2

Question 1

What does the abbreviation 'EL.' or 'ELEV.' indicate on a construction drawing?

Accepted Answer

Elevation or height above datum

Answer

Electrical panel

Answer

Elevator shaft

Answer

Elongated dimension

Question 2

On a site plan, what do contour lines represent?

Accepted Answer

Points of equal elevation on the ground

Answer

Property boundaries

Answer

Underground utility locations

Answer

Setback requirements from the property line

Question 3

What is the purpose of a specifications book (spec book) that accompanies a set of construction drawings?

Accepted Answer

To describe material quality, installation methods, and performance requirements not shown on drawings

Answer

To provide an estimate of material costs

Answer

To list the subcontractors approved for the project

Answer

To outline the construction schedule and milestones

Question 4

What does a centre line symbol (long dash, short dash, long dash pattern) indicate on a blueprint?

Accepted Answer

The centre axis of a symmetrical feature, opening, or structural member

Answer

A cut line for a section view

Answer

A property boundary line

Answer

An overhead obstruction

Question 5

When reading a roof plan, what does the arrow direction typically indicate?

Accepted Answer

The direction of roof slope (downward)

Answer

The prevailing wind direction

Answer

North orientation

Answer

The direction of rafter installation

Question 6

In the CSA standard for construction drawings used in Canada, what sheet designation prefix is used for structural drawings?

Accepted Answer

S (Structural)

Answer

A (Architectural)

Answer

M (Mechanical)

Answer

E (Electrical)