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Technical Drawing 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 Technical Drawing flashcards as text

  1. What does a circle with an 'X' through it (target point symbol) represent in GD&T?

    Answer: A datum target point used to establish a datum plane

    Datum target points are specific, controlled contact points used to simulate datums on irregular or uneven surfaces during inspection.

  2. In an isometric drawing, the three principal axes are drawn at what angles relative to horizontal?

    Answer: 30°, 90°, and 150° (making 30° angles with horizontal for the two receding axes)

    In isometric projection, the two receding axes are drawn at 30° above horizontal, with the vertical axis at 90°, giving equal emphasis to three faces.

  3. What is the function of an extension line in a technical drawing?

    Answer: To connect the dimension line to the feature being dimensioned

    Extension lines extend from the edge of a feature to provide a reference point for the dimension line, which carries the measurement value.

  4. A counterbore is represented on a drawing with which symbol prefix?

    Answer: ⌴ (counterbore symbol — flat-bottomed recess symbol)

    The counterbore symbol (a square U-shape) precedes the diameter and depth callout of the flat-bottomed recess that accommodates bolt heads.

  5. Which line type is used to represent the cutting plane in a section view?

    Answer: A thin chain line (alternating long and short dashes) with thick ends and arrows

    The cutting plane line is a thin chain line that becomes thick at the ends where arrows indicate the viewing direction for the section.

  6. What does 'true position' control in GD&T?

    Answer: The allowable variation in location of a feature from its theoretically exact position

    True position defines a tolerance zone (cylindrical or parallel planes) centered on the theoretically exact location of a feature.

  7. When a drawing note states 'UNLESS OTHERWISE SPECIFIED, ALL TOLERANCES ±0.010', this tolerance applies to:

    Answer: Only the dimensions shown without any individual tolerance

    General tolerance notes apply as a default to any dimension that does not already have a specific tolerance assigned to it.