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Measurement Tools Flashcards

7 cards from real AIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Measurement Tools flashcards as text

  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:

    Answer: Higher than the right side

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

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

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

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

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

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

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

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

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

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

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

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

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

  6. An apprentice measures a shaft with a micrometer and gets 1.2505 inches, but the blueprint calls for 1.250" ± 0.001". Is the part in tolerance?

    Answer: Yes, 1.2505" is within the 1.249" to 1.251" range

    The tolerance range is 1.249" to 1.251", and 1.2505" falls within that range, so the part is acceptable.

  7. What is the main reason measuring tools should be kept away from heat sources and stored at room temperature?

    Answer: Because thermal expansion and contraction change the dimensions of precision instruments and workpieces

    Metals expand when heated and contract when cooled; temperature changes alter the dimensions of tools and workpieces, causing measurement errors.