After the Workpiece Is Positioned and Securely Clamped, a Center

question 19

Multiple Choice

After the workpiece is positioned and securely clamped, a center drill is usually used to create a more positive starting point for a twist drill. This operation is sometimes called ____.

• A) spotting
• B) sinking
• C) boring
• D) reaming

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Definitions:

Northridge Earthquake

A magnitude 6.7 earthquake that struck the Los Angeles area of California, USA, on January 17, 1994.

Divergent Plate Boundary

A region where two tectonic plates move away from each other, leading to the creation of new crust as magma rises to the surface.

Offset Stream Channel

A stream or river channel that has been shifted laterally due to tectonic movement, creating a visible displacement along a fault line.

Active Faults

Faults that have moved recently (in geological terms) and are likely to experience future earthquakes.