IST Blueprint Reading and Technical Drawings

Question 1

What type of line in a technical drawing represents the visible outline or edge of an object?

Accepted Answer

Object line (visible line)

Answer

Object lines (visible lines) are solid, thick continuous lines that represent edges and outlines directly visible from the current viewing angle.

Question 2

What do dashed lines represent in a technical drawing?

Accepted Answer

Edges or features hidden behind a visible surface

Answer

Dashed lines (hidden lines) represent edges or features that exist behind the visible surface and cannot be seen from the current viewing angle.

Question 3

In blueprint reading, what does the abbreviation 'OD' stand for?

Accepted Answer

Outer Diameter

Answer

OD stands for Outer Diameter, which refers to the measurement across the outside of a circular or cylindrical object such as a pipe or shaft.

Question 4

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

Accepted Answer

To provide part name, material, scale, revision history, and other identifying information

Answer

The title block contains essential information including part name, part number, material specification, drawing scale, drafter name, and revision history used to control the document.

Question 5

What does the scale notation '1:2' on a technical drawing mean?

Accepted Answer

The drawing is half the actual size of the object

Answer

A scale of 1:2 means the drawing is drawn at half actual size, so every unit measured on the drawing represents two units on the real object.

IST - Industrial Skills Test Practice Test

IST - Industrial Skills Test Practice Test

IST Blueprint Reading and Technical Drawings