2.7 Accuracy design and manufacture (key terms)

Question 1

Accuracy

Answer 1

The amount of conformity of a measurement to the required value

Question 2

Tolerance

Answer 2

The acceptable upper and lower limits of accuracy of a measurement

Question 3

Measurement

Answer 3

The process of using tools to check existing dimensions

Question 4

Dimension

Answer 4

The measured distance in a straight line between features of a part or product, such as height or length

Question 5

Marking out

Answer 5

The transfer of designs onto pieces of materials or parts

Question 6

Datum

Answer 6

A surface or edge used as a reference from which measurements are taken to improve accuracy

Question 7

Jig

Answer 7

A device used to control the motion of a tool such as a drill relative to a workpiece

Question 8

Fixture

Answer 8

A robust frame with holding points and clamps to hold product components firmly in place for manufacturing processes such as welding

Question 9

Template

Answer 9

A rigid shape or pattern, used to transfer a design onto a workpiece to ensure consistency