Design of Machine Elements MCQs with answers Page - 10

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Admin • 831.35K Points
Coach

Q. Determine the secondary shear stress acting on the bolt 3 and its direction. The bolts are equidistant having separated by 60mm and the margin to the left and right is 25mm.Also P=5kN acts at a distance of 200mm from the channel.

  • (A) 6100n vertically up
  • (B) 4500n vertically down
  • (C) 6100n vertically up
  • (D) 4500n vertically down

A

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Q. Determine the size of the bolts if yield strength of bolt is 400N/mm² and factor of safety is 4. The bolts are equidistant having separated by 60mm and the margin to the left and right is 25mm. Also P=5kN acts at a distance of 200mm from the channel.

  • (A) 14.34mm
  • (B) 13.44mm
  • (C) 15.44mm
  • (D) 12.66mm

A

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Q. Knuckle Joint can’t be used to connect two intersecting rods.

  • (A) yes
  • (B) no, it can’t be used
  • (C) it can be used with some modificatios
  • (D) it is expensive and hence isn’t used

A

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Q. A knuckle joint is also called socket pin joint.

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

A

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Q. If knuckle joint is to fail by crushing failure of pin in fork, then determine the diameter of knuckle pin when 50kN axial tensile force act on rods. Given: Max allowable compressive stress=25N/mm², thickness of each eye of fork=25mm.

  • (A) 40mm
  • (B) 50mm
  • (C) 60mm
  • (D) 70mm

A

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Q. Can the cotter joint be used to connect slide spindle and fork of valve mechanism?

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

A

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Q. Among gas and electric arc welding, which has the higher rate of heating?

  • (A) gas welding
  • (B) electric arc welding
  • (C) gas welding and electric arc welding have equal rate of heating
  • (D) cannot be determined

A

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Q. Forge welding involves heating of parts to elastic stage and joint is prepared by impact force.

  • (A) yes
  • (B) no, it is done up to plastic stage
  • (C) heating is done up to boiling point
  • (D) none of the listed

A

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Q. Which of the following isn’t a main part of rivet?

  • (A) head
  • (B) shank
  • (C) point
  • (D) thread

A

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Q. In hot riveting the shank portion is subjected to compressive stress.

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

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