Design of Machine Elements MCQs with answers Page - 8

Here, you will find a collection of MCQ questions on Design of Machine Elements. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Cylinder roller creates lesser noise than deep groove ball bearing.

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

A

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Q. Straight bevel gears are easy to design and manufacture and give reasonably good service with quieter operation.

  • (A) true
  • (B) no, noise problem
  • (C) no, vibration problem
  • (D) none of the listed

A

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Q. Which of the following creates smoother motion?

  • (A) straight bevel gears
  • (B) spiral bevel gears
  • (C) equal for straight and spiral
  • (D) none of the mentioned

A

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Q. When the pitch angle is greater than 90⁰, it is called external bevel gear.

  • (A) true
  • (B) internal
  • (C) helical
  • (D) herringbone

A

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Q. If pitch angle is >90, the bevel gear is?

  • (A) internal
  • (B) external
  • (C) crown
  • (D) static

A

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Q. If allowable shear stress in the shaft is 70N/mm² and torsional and bending moments are M=1185000N-mm and m=330000N-mm, find the diameter of the shaft.

  • (A) 36.8mm
  • (B) 39.7mm
  • (C) 44.7mm
  • (D) 40.3mm

A

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Q. Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm².

  • (A) none of the listed
  • (B) 41.2mm
  • (C) 35.8mm
  • (D) 38.8mm

A

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Q. The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.

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

A

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Q. Solid shaft is costlier than hollow shaft of same weight.

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

A

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Q. Flexible shafts have rigidity in torsion making them flexible.

  • (A) low
  • (B) high
  • (C) very high
  • (D) infinitely small

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