Design of Machine Elements MCQs with answers Page - 13

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Q. Which bolt is under maximum shear stress?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) all are under equivalent shear stress

A

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Q. Arrange the bolts in order of decreasing shear stresses.

  • (A) 1>2>3
  • (B) 2>1>3
  • (C) 3>1>2
  • (D) 3>2>1

A

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Q. A knuckle joint is unsuitable for two rotating shafts, which transmit torque

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

A

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Q. A maximum of how many roads may be connected using a knuckle joint?

  • (A) 2
  • (B) 3
  • (C) 4
  • (D) 5

A

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Q. In which of the following bonding theory, water molecules break down to form H+ and OH- ions?

  • (A) electrostatic bonding theory
  • (B) hot strength theory
  • (C) surface tension theory
  • (D) block and wedge theory

A

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Q. What does the clay particle absorb in electrostatic bonding theory?

  • (A) complete water
  • (B) h+ ions
  • (C) oh–ions
  • (D) sand grains

A

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Q. For bonding action of clays, what is the amount of water needed?

  • (A) 1.5%-8%
  • (B) 3.5%-11%
  • (C) 4.5%-12%
  • (D) 5.5%-13%

A

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Q. What is the amount of sea coal needed in cast irons for large green casting moulding sands?

  • (A) 10%
  • (B) 15%
  • (C) 20%
  • (D) 25%

A

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Q. Pitch maybe used up to what percent?

  • (A) 1%
  • (B) 2%
  • (C) 3%
  • (D) 4%

A

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Q. Which of the following increases the dry strength of the sand?

  • (A) iron oxides
  • (B) fuel oils
  • (C) cereals
  • (D) dextrin and molasses

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