CAD-CAM and Automation MCQs with answers Page - 1

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Q. Which coordinate system is a device-dependent coordinate system?

  • (A) World Coordinate System
  • (B) Model Coordinate System
  • (C) User Coordinate System
  • (D) Screen Coordinate System

A

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Q. Which of the following is the default coordinate system?

  • (A) User Coordinate System
  • (B) World Coordinate System
  • (C) Screen Coordinate System
  • (D) None of the above

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Q. When every entity of a geometric model remains parallel to its initial position, the transformation is called as

  • (A) User Coordinate System
  • (B) World Coordinate System
  • (C) Screen Coordinate System
  • (D) None of the above

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Q. In which type of projection, actual dimensions and angles of objects and therefore shapes cannot be preserved?

  • (A) User Coordinate System
  • (B) World Coordinate System
  • (C) Screen Coordinate System
  • (D) None of the above

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Q. The matrix representation for translation in homogeneous coordinates is

  • (A) User Coordinate System
  • (B) World Coordinate System
  • (C) Screen Coordinate System
  • (D) None of the above

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Q. The matrix representation for scaling in homogeneous coordinates is

  • (A) P’=S*P
  • (B) P’=R*P
  • (C) P’=dx+dy
  • (D) P’=S*S

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Q. The two-dimensional rotation equation in the matrix form is

  • (A) P’=T+P
  • (B) P’=S*P
  • (C) P’=R*P
  • (D) P’=dx+dy

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Q. What is the use of homogeneous coordinates and matrix representation?

  • (A) To treat all 3 transformations in a consistent way
  • (B) To scale
  • (C) To rotate
  • (D) To shear the object

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Q. If point are expressed in homogeneous coordinates then the pair of (x, y) is represented as

  • (A) (x’, y’, z’)
  • (B) (x, y, z)
  • (C) (x’, y’, w’)
  • (D) (x’, y’, w)

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Q. For 2D transformation the value of third coordinate i.e. w (or h) =?

  • (A) 1
  • (B) 0
  • (C) -1
  • (D) Any value

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