Design of Machine Elements MCQs with answers Page - 16

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Q. Which of the following are characteristics of skew bevel gears?

  • (A) straight teeth
  • (B) mounted on parallel shafts
  • (C) mounted on intersecting shafts
  • (D) all of the mentioned

A

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Q. Hypoid gears are based on surfaces that are paraboloids of revolution.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. When two hyperboloids are rotated, the resulting motion is

  • (A) sliding
  • (B) turning
  • (C) combination of turning and sliding
  • (D) rotary

A

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Q. Zerol gears are straight bevel gears with zero spiral angle.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. Zerol gears give lesser contact ratio.

  • (A) true
  • (B) no, larger contact ratio
  • (C) zero contact
  • (D) none of the listed

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Q. Hydrodynamic lubrication takes place in region?

  • (A) bc
  • (B) cd
  • (C) both bc and cd
  • (D) none of the mentioned

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Q. Coefficient of friction is minimum at

  • (A) it is same at each point
  • (B) b
  • (C) c
  • (D) d

A

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Q. Bearing modulus is the bearing characteristic number at

  • (A) b
  • (B) c
  • (C) d
  • (D) none of the listed

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Q. If viscosity of the lubricant is very low than BCN will lie in the region

  • (A) bc
  • (B) point c
  • (C) cd
  • (D) can’t be determined

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Q. The fundamental equation for viscous flow is given by ∆pbhᵌ/6µl where symbols have their usual meanings.

  • (A) 6 is to be replaced by 3
  • (B) 6 is to be replaced by 12
  • (C) 6 is to be replaced by 9
  • (D) 6 is to be replaced by 15

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