Machine Design MCQs with answers Page - 3

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. Belt slip may occur due to

  • (A) heavy load
  • (B) loose belt
  • (C) driving pulley too small
  • (D) all of the above

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Q. Brittle coating technique is used for

  • (A) determining brittleness
  • (B) protecting metal against corrosion
  • (C) protecting metal against wear and tear
  • (D) experimental stress analysis

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Q. Buttress threads are usually found on

  • (A) screw cutting lathes
  • (B) feed mechanisms
  • (C) spindles of bench vices
  • (D) railway carriage couplings

A

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Q. Cap screws are

  • (A) similar to small size tap bolts except that a greater variety of shapes of heads are available
  • (B) slotted for a screw driver and generally used with a nut
  • (C) used to prevent relative motion be-tween parts
  • (D) provided with detachable caps

A

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Q. Castle nut is a locking device in which

  • (A) one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
  • (B) a slot is cut partly is middle of nut and then slot reduced by tightening a screw
  • (C) a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
  • (D) through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end

A

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Q. Coaxing is the procedure of increasing

  • (A) metal strength by cycling
  • (B) metal hardness by surface treatment
  • (C) metal resistance to corrosion by coating
  • (D) fatigue limit by overstressing the metal by successively increasing loadings

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Q. Cold working

  • (A) increases the fatigue strength
  • (B) decreases the fatigue strength
  • (C) has no influence on fatigue strength
  • (D) alone has no influence on fatigue strength

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Q. Elastic nut is a locking device in which

  • (A) one small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
  • (B) a slot is cut partly in middle of nut and then slot reduced by tightening a screw
  • (C) hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
  • (D) through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

A

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Q. Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

  • (A) dynamic loading
  • (B) static loading
  • (C) combined static and dynamic loading
  • (D) completely reversed loading

A

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Q. Eye bolts are used for

  • (A) foundation purposes
  • (B) locking devices
  • (C) absorbing shock and vibrations
  • (D) lifting and transportation of machines and cubicles.

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