CAD-CAM and Automation MCQs with answers Page - 33

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Q. Which of the following is NOT true? Image formed by reflection through a plane mirror is

  • (A) of same size
  • (B) same orientation
  • (C) is at same distance from the mirror
  • (D) virtual

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Q. Which of the following represents shearing?

  • (A) (x, y) → (x+shx, y+shy)
  • (B) (x, y) → (ax, by)
  • (C) (x, y) → (x cos(θ)+y sin(θ), -x sin(θ)+y cos(θ))
  • (D) (x, y) → (x+shy, y+shx)

A

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Q. If a ‘3 x 3’ matrix shears in X direction, how many elements of it are ‘1’?

  • (A) 2
  • (B) 3
  • (C) 6
  • (D) 5

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Q. If a ‘3 x 3’ matrix shears in Y direction, how many elements of it are ‘0’?

  • (A) 2
  • (B) 3
  • (C) 6
  • (D) 5

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Q. Shearing is also termed as

  • (A) Selecting
  • (B) Sorting
  • (C) Scaling
  • (D) Skewing

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Q. Shearing and reflection are types of translation.

  • (A) True
  • (B) False
  • (C) ---
  • (D) ---

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Q. Which of this is compulsory for 2D reflection?

  • (A) Reflection plane.
  • (B) Origin
  • (C) Reflection axis
  • (D) Co-ordinate axis.

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Q. Two successive translations are

  • (A) Multiplicative
  • (B) Inverse
  • (C) Subtractive
  • (D) Additive

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Q. Two successive translations are commutative.

  • (A) True
  • (B) False
  • (C) ---
  • (D) ---

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Q. General pivot point rotation can be expressed as

  • (A) T(zr,yr).R(θ).T(-zr,-yr) = R(xr,yr,θ)
  • (B) T(xr,yr).R(θ).T(-xr,-yr) = R(xr,yr,θ)
  • (C) T(xr,yr).R(θ).T(-xr,-yr) = R(zr,yr,θ)
  • (D) T(xr,yr).R(θ).T(-xr,-yr) = R(zr,yr,θ)

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