TU10_HoleStandards&Inspections Vocab

Question 1

Calibration

Answer 1

The comparison and adjustment of a device with unknown accuracy to a device with a known, accurate standard. It eliminates any variation in the device being checked.

Question 2

Concavity

Answer 2

A condition in which the surface of an object curves inward. This can affect the dimensions of a hole.

Question 3

Linear Scale

Answer 3

A series of parallel lines that represent a measurement standard. A steel rule contains this on it.

Question 4

Lobing

Answer 4

A condition in which the manufacturing process creates a rounded projection from what would otherwise be a circular hole. A hole may have more than on of it.

Question 5

Linearity

Answer 5

The amount of error changes throughout an instrument’s measurement range. This is also the amount of deviation from an instrument’s ideal straight-line performance.

Question 6

Mastering

Answer 6

A quick check of a measuring device against a known standard reference, such as a gage block, to determine if the device is reading the measurement correctly. Instruments should be this before use.

Question 7

Out-Of-Round

Answer 7

An irregularly shaped circle that is not totally round. Many of these conditions, such as ovality, are caused by lobing.

Question 8

Ovality

Answer 8

A condition in which a hole that should be round has two opposing lobes, resulting in an elongated or egg-shaped hole. This is an example of lobing.

Question 9

Radiused

Answer 9

Rounding on the end of a part, piece, or jaw. Telescope gages have telescoping plungers with these on the ends.