Machine Design MCQs with answers Page - 8

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. A solderberg line for ductile material gives upper limit for

  • (A) Increasing the diameter of threaded portion
  • (B) alternating tensile stress
  • (C) alternating compressive stress
  • (D) any combination of mean and alternating stresses

A

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Q. If water in closed pipe freezes, the pipe will

  • (A) Rupture in a plane inclined at 45 degree to the longitudinal axis of the pipe
  • (B) Rupture along a line running longitudinally along the pipe
  • (C) Rupture along a plane perpendicular to the axis of pipe
  • (D) Rupture zig-zag along the length

A

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Q. In a bolt the plane of shear

  • (A) Should be across threaded portion of the shank
  • (B) Should never be acress threaded portion of the shank
  • (C) Should be parallel to the axis of bolt
  • (D) Should be normal so the threaded portion of the shank

A

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Q. In case of rivets, the countersunk heads are used to

  • (A) connect unequal sections
  • (B) Increasing the diameter of threaded portion
  • (C) provide a fluish surface
  • (D) connect structural members

A

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Q. Bolts in structures are often tightened

  • (A) upto 90% of yield point
  • (B) below yield point
  • (C) Increasing the diameter of threaded portion
  • (D) upto or beyond yield point

A

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Q. Which of the following key permits axial relative motion between the shaft and the hub?

  • (A) Wood ruff key
  • (B) Square key
  • (C) Increasing the diameter of threaded portion
  • (D) Feather key

A

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Q. The moment-cuvature relation at a plastic hinge is

  • (A) is a constant curvature for all moments
  • (B) a constant moment for different curvatures
  • (C) Increasing the diameter of threaded portion
  • (D) always linear

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Q. A simple supported steel beam when loaded with a force of 100 kg at A is found to deflect 10 mm at B. What force at B would cause a deflection of 2.5 mm at A

  • (A) 10 kg
  • (B) 50 kg
  • (C) 100 kg
  • (D) 25 kg

A

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Q. Acoustical materials

  • (A) Create sound
  • (B) Create and reflect sound
  • (C) Absorb sound
  • (D) Reflect sound

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Q. Fatigue strength of a surface may be increased by

  • (A) Applying concentrated hydrochloric acid on the surface
  • (B) Applying birine on the surface and then washing with cold water
  • (C) Making surface rough
  • (D) Polishing the surface

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