Machine Design MCQs with answers Page - 7

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

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Q. While designing a shaft pulley and key for a system

  • (A) Shaft is the weakest member
  • (B) Pulley is the weakest member
  • (C) Key is the weakest member
  • (D) All are designed for equal strength

A

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Q. In case of biaxial stress system when a member is subjected to tensile stresses in two perpendicular directions the maximum shear stress in case of mild steel occurs on a plane inclined at

  • (A) 22
  • (B) 75?
  • (C) 45?
  • (D) 67

A

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Q. For a bearing which of the following is maximum?

  • (A) Minimum life
  • (B) Average life
  • (C) Median life
  • (D) (A), (B) and (C) above are identical

A

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Q. The approximate value of allowable stress for carbon steel under static loading (in kg/cm2) is

  • (A) 500-1000
  • (B) 10000-15000
  • (C) 4000-7500
  • (D) 20000-25000

A

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Q. Stub tooth is

  • (A) Longer than standard tooth depth
  • (B) Non-standard tooth
  • (C) Shorter than standard tooth depth
  • (D) Equivalent rack tooth

A

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Q. Self-tapping screws are generally used in

  • (A) Shear metal work
  • (B) Machine tools
  • (C) Automobiles
  • (D) Aeroplanes

A

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Q. Fatigue is mostly initiated at

  • (A) core
  • (B) centre
  • (C) Increasing the diameter of threaded portion
  • (D) surface

A

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Q. Which of the following joint is used for pipes carrying water under low pressures?

  • (A) Socket joint
  • (B) Increasing the diameter of threaded portion
  • (C) Expansion joint
  • (D) Adhesive joint

A

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Q. In case of steels, as the percentage of carbon content increases

  • (A) Elongation increases
  • (B) Chrome steel
  • (C) Hardness decreases
  • (D) Tensile strength increases

A

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Q. If screw threads are to be used in a situation involving high stresses in one direction only, the types of threads suitable for this would be

  • (A) BA
  • (B) BSW
  • (C) Buttress
  • (D) Acme

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