CAD-CAM and Automation MCQs with answers Page - 31

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Q. To generate a rotation , we must specify

  • (A) Rotation angle θ
  • (B) Distances dx and dy
  • (C) Rotation distance
  • (D) All of the mentioned

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Q. The rotation axis that is perpendicular to the xy plane and passes through the pivot point is known as

  • (A) Rotation
  • (B) Translation
  • (C) Scaling
  • (D) Shearing

A

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Q. Positive values for the rotation angle θ defines

  • (A) Counter clockwise rotations about the end points
  • (B) Counter clockwise translation about the pivot point
  • (C) Counter clockwise rotations about the pivot point
  • (D) Negative direction

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Q. The original coordinates of the point in polar coordinates are

  • (A) X’=r cos (Ф +ϴ) and Y’=r cos (Ф +ϴ)
  • (B) X’=r cos (Ф +ϴ) and Y’=r sin (Ф +ϴ)
  • (C) X’=r cos (Ф -ϴ) and Y’=r cos (Ф -ϴ)
  • (D) X’=r cos (Ф +ϴ) and Y’=r sin (Ф -ϴ)

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Q. From the following, which one will require 4 matrices to multiply to get the final position?

  • (A) Rotation about the origin
  • (B) Rotation about an arbitrary Point
  • (C) Rotation about an arbitrary line
  • (D) Scaling about the origin

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Q. Rotation is simply---------object w.r.t origin or centre point.

  • (A) Turn
  • (B) Shift
  • (C) Compression
  • (D) Drag element

A

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Q. A line AB with end point A (2,3) & B (7,8) is to be rotated about origin by 300 in clockwise direction. Determine the coordinates of end points S of rotated line.

  • (A) (3.232, 2.598)
  • (B) (5.232, 3.598)
  • (C) (3.232, 1.298)
  • (D) (3.232, 1.598)

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Q. An ellipse can also be rotated about its center coordinates by rotating

  • (A) End points
  • (B) Major and minor axes
  • (C) Only a
  • (D) None

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Q. The transformation that is used to alter the size of an object is

  • (A) Scaling
  • (B) Rotation
  • (C) Translation
  • (D) Reflection

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Q. Scaling of a polygon is done by computing

  • (A) The product of (x, y) of each vertex
  • (B) (x, y) of end points
  • (C) Center coordinates
  • (D) Only a

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