AIT Measurement Tools 5

Question 1

A level vial bubble should be centered for a level reading. If the bubble is off to the left, the left side of the tool is:

Accepted Answer

Higher than the right side

Answer

The bubble moves toward the high end, so a bubble shifted left means the left side is elevated.

Question 2

What is the purpose of the lock nut (thimble lock) on a micrometer?

Accepted Answer

To lock the spindle in position after a measurement so the reading is preserved

Answer

The lock nut clamps the spindle so the micrometer can be removed from the work without losing the reading.

Question 3

A carpenter's folding rule differs from a steel tape primarily because it:

Accepted Answer

Has rigid sections that maintain shape, useful for inside measurements without bending

Answer

The rigid folding sections hold their shape, making inside measurements easy without the tape sagging or curling.

Question 4

When a laser level is used in construction, what does it project to establish a reference?

Accepted Answer

A visible beam or plane of light at a consistent elevation or angle

Answer

A laser level projects a visible (or detector-readable) plane or line of light that defines a consistent level or angled reference.

Question 5

When checking the flatness of a machined surface with a straightedge and feeler gauges, what does the feeler gauge measure?

Accepted Answer

The gap between the straightedge and the surface (deviation from flat)

Answer

The feeler gauge measures the gap between the known-flat straightedge and the surface, revealing high and low spots.

(AIT) Apprenticeship and Industry Training Practice Test