Design of Machine Elements MCQs with answers Page - 15

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Q. Compressed length is smaller than the solid length.

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

A

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Q. Pitch of coil is defined as axial distance in compressed state of the coil.

  • (A) yes
  • (B) it is measured in uncompressed state
  • (C) it is same in uncompressed or compressed state
  • (D) none of the listed

A

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Q. The maximum fluctuation of speed is the

  • (A) difference of minimum fluctuation of speed and the mean speed
  • (B) difference of the maximum and minimum speeds
  • (C) sum of the maximum and minimum speeds
  • (D) variations of speed above and below the mean resisting torque line

A

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Q. In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

  • (A) fluctuation of energy
  • (B) maximum fluctuation of energy
  • (C) coefficient of fluctuation of energy
  • (D) none of the mentioned

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Q. The ratio of the maximum fluctuation of energy to the ……. is called coefficient of fluctuation of energy.

  • (A) minimum fluctuation of energy
  • (B) workdone per cycle
  • (C) maximum fluctuation of energy
  • (D) none of the mentioned

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Q. Due to the centrifugal force acting on the rim, the flywheel arms will be subjected to

  • (A) tensile stress
  • (B) compressive stress
  • (C) shear stress
  • (D) none of the mentioned

A

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Q. The cross-section of the flywheel arms is usually

  • (A) elliptical
  • (B) rectangular
  • (C) i-section
  • (D) l-section

A

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Q. In order to find the maximum bending moment on the arms, it is assumed as a

  • (A) simply supported beam carrying a uniformly distributed load over the arm
  • (B) fixed at both ends
  • (C) cantilever beam fixed at the hub and carrying a concentrated load at the free end of the rim
  • (D) none of the mentioned

A

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Q. The diameter of the hub of the flywheel is usually taken

  • (A) equal to the diameter of the shaft
  • (B) twice the diameter of the shaft
  • (C) three times the diameter of the shaft
  • (D) four times the diameter of the shaft

A

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Q. Crown gears having a pitch angle of 90⁰

  • (A) =90
  • (B) <90
  • (C) >90
  • (D) none of the listed

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