Question

A right handed screw will advance in the direction of the positive $Z$-axis, if

• A. the positive $x$-axis is rotated counter clockwise into the positive $Y$-axis
• B. the positive $X$-axis rotated counter clockwise into the positive $Z$-axis
• C. Both(a) and (b) are true
• D. Both(a) and (b) are false

Answer 1

Answer: (A)

When the positive $X$-axis is rotated counterclockwise into the positive $Y$-axis, a right handed (standard) screw would advance in the direction of the positive Z-axis.
In a right handed coordinate system, the thumb of the right hand points in the direction of the positive Z-axis when the fingers are curled in the direction away from the positive $X$-axis toward the positive $Y$-axis.