Machine Design MCQs with answers Page - 9

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. The function of gear box in an automobile is

  • (A) To provide variable speeds
  • (B) To reduce speed
  • (C) To increase speed
  • (D) To produce torque

A

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Q. A unknown weight falls through 1 cm on a collar rigidly attached to the lower end of a vartical bar 3 cm long and 6 cm2 in section. If the maximum instantaneous extension is 2 mm the value of stress would be

  • (A) 1333 kg/cm2
  • (B) 1000 kg/cm2
  • (C) 667 kg/cm2
  • (D) 1500 kg/cm2

A

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Q. Which is the heaviest metal?

  • (A) Mild steel
  • (B) Lead
  • (C) Platinum
  • (D) Gold

A

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Q. Braking system used on aircraft is

  • (A) Pneumatic
  • (B) Regenerative
  • (C) Plugging
  • (D) Hydraulic

A

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Q. A fine series screws of major diameter 8 mm and pitch 1 mm is generally designated as

  • (A) M 8 x 1
  • (B) 8 x M 1
  • (C) 8 x 1 M
  • (D) 8 M

A

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Q. In order to avoid interference for 20 pressure and teeth, minimum number of teeth should be

  • (A) 8
  • (B) More than 18
  • (C) 12
  • (D) More than 24

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Q. The bursting pressure of 12 mm ID, 14 mm OD seamless cartridge brass tubing having ultimate whear stress of 225 Mpa, will be nearly

  • (A) 40 Kpa
  • (B) Increasing the diameter of threaded portion
  • (C) 20 Kpa
  • (D) 10 Kpa

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Q. Web crippling in beams generally occurs at points where

  • (A) concentrated load occurs
  • (B) deflection is maximum
  • (C) Increasing the diameter of threaded portion
  • (D) shear force is maximum

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Q. Smooth bearing surface is an essential pre-requisite in case of

  • (A) thin-film lubrication
  • (B) thick film lubrication
  • (C) both film (A) and (B) above
  • (D) none of the above

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Q. Machines screws are

  • (A) Generally provided with head longer than that of a normal screw
  • (B) Headless
  • (C) Provided with slotted head and used with a nut
  • (D) Screws with button-head

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