Design of Machine Elements MCQs with answers Page - 3

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A

Admin • 802.91K Points
Coach

Q. Stress intensity factor is the critical value of stress at which crack extension occurs.

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

A

Admin • 802.91K Points
Coach

Q. Fracture toughness does not depend upon geometry of the part containing crack

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

A

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Q. How many modes are there for crack propagation?

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

A

Admin • 802.91K Points
Coach

Q. A curved beam has neutral axis is curved while loaded and straight when unloaded.

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

A

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Coach

Q. The bending stress in a straight beam varies linearly with the distance from neural axis like that in a curved beam.

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

A

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Coach

Q. Which of the following are important parts of knuckle joint?

  • (A) eye
  • (B) pin
  • (C) fork
  • (D) each of the mentioned

A

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Coach

Q. Calculate the diameter of pin from shear consideration with maximum shear stress allowed is 40NN/mm² and an axial tensile force of 50kN is acting on the rod.

  • (A) 39mm
  • (B) 44mm
  • (C) 49mm
  • (D) 52mm

A

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Q. A knuckle joint can be used in valve mechanism of a reciprocating engine.

  • (A) yes
  • (B) no
  • (C) yes but there are stress probles
  • (D) no as it is very dangerous to use

A

Admin • 802.91K Points
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Q. Cotter joint is used when the members are subjected to which type of stresses?

  • (A) axial tensile
  • (B) axial compressive
  • (C) axial tensile or compressive
  • (D) none of the mentioned

A

Admin • 802.91K Points
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Q. The principle of wedge action is used in cotter joint.

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

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