OIT Blueprint Reading and Technical Drawing

Question 1

What does a hidden line (dashed line) represent in a technical drawing?

Accepted Answer

An edge or surface that is not visible from the current view

Answer

Hidden lines (dashed lines) represent edges or surfaces that exist in the object but cannot be seen from the current viewing angle.

Question 2

On a blueprint, the scale notation '1:2' means which of the following?

Accepted Answer

1 unit on the drawing equals 2 units in real life

Answer

A scale of 1:2 means every 1 unit measured on the drawing represents 2 units in actual size, making the drawing half of real size.

Question 3

What is the primary purpose of a title block on a technical drawing?

Accepted Answer

To provide key identification and reference information about the drawing

Answer

The title block contains critical reference information such as the drawing number, title, scale, date, drafter's name, and revision level.

Question 4

What type of view is created by passing an imaginary cutting plane through an object to reveal its internal features?

Accepted Answer

Section view

Answer

A section view (cross-section) reveals interior details by showing the object as if it were cut along a cutting plane, making hidden internal features visible.

Question 5

In technical drawing, what does GD&T stand for?

Accepted Answer

Geometric Dimensioning and Tolerancing

Answer

GD&T (Geometric Dimensioning and Tolerancing) is a system for defining and communicating engineering tolerances and allowable variations in form, fit, and function.

(OIT) Ontario Industrial Trades Certification Practice Test

(OIT) Ontario Industrial Trades Certification Practice Test

OIT Blueprint Reading and Technical Drawing