Main concepts

Question 1

What is a chamfer?

Answer 1

2mm thick and angle 45 ̊ inclination is dimensioned as: 2 x 45°

Question 2

How do circles appear when viewed in isometric?

Answer 2

They appear elliptical

Question 3

What is a dimension line?

Answer 3

A line that extrudes horizontally from the dimensioned number.

Question 4

What is a extension line?

Answer 4

A extension line is the line which resides beneath the dimenion line and extrudes vertically from the dimensioned line.

Question 5

What is a reader line?

Answer 5

A line usually used to dimension circles that extrudes from the circle and sometimes crosses the object itself.

Question 6

What is the symbol for diameter?

Answer 6

Diameter symbol Ø

Question 7

How do you normally write radius?

Answer 7

R(number) e.g. R10

Question 8

List the 3 main types of pictorial views.

Answer 8

Isometric, oblique, perspective.

Question 9

What is a screw thread?

Answer 9

A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix.

Question 10

What does M12 x 1.3 mean as a screw thread?

Answer 10

A metric thread of 12mm diameter with a 1.3mm pitch between thread crest

Question 11

What should a parts list include?

Answer 11

part number, manufacturing material, number of parts needed

Question 12

What is a Auxiliary View?

Answer 12

To create a true projectionplane from an inclined plane in one of the primary views

Question 13

What are the two types of Oblique projection?

Answer 13

Cavalier Projection and Cabinet Projection.

Question 14

What is Cavalier Projection?

Answer 14

receding lines are true length and at 45 degrees

Question 15

What is Cabinet projection?

Answer 15

the receding lines are foreshortened by half

Question 16

What are Sections?

Answer 16

Sections are used to clarify the interior construction of a part that can not be clearly described by hidden lines in exterior views

Question 17

What is the drawing standard that is used in Australia?

Answer 17

AS1100

Question 18

Why do we used AS1100 as a drawing standard?

Answer 18

It defines every aspect of thedrawing. AS1100 provides a standard that (if followed by all companies), allows for a clarity,understanding and uniformity across all drawings generated nation wide

Question 19

What are the advantages and disadvantages of CAD?

Answer 19

Advantages: Accuracy, file sharing/collaboration, rapid prototyping

Disadvantages: File loss/corruption, expensive software, training

Question 20

What are the advantages and disadvantages of sketching?

Answer 20

Advantages: Quick, No specialist equipment

Disadvantages: Not as accurate, sketching skills are required

Question 21

What is a fillet?

Answer 21

A fillet is a rounded corner or transition between two surfaces (a round but curving inwards)

Question 22

What is a round?

Answer 22

A round is a rounded external edge feature.

Question 23

What is a through hole?

Answer 23

A hole that fully passes through an object

Question 24

What is a blind hole?

Answer 24

A hole that passes through an object but doesn’t go all the way through

Question 25

What is a countersunk hole?

Answer 25

A countersunk hole is a hole that has a countersunk at the top allowing a screw to be used.