Machine Design - Mechanical Engineering Questions and Answers

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The velocity factor for precision metallic gears cut with high accuracy and operating at velocities upto 20 m/s is equal to

\(\frac { 0.75 } { 0.75 + \sqrt{v} }\)

\(\frac { 3 } { 3 + \sqrt{v} }\)

\(\frac { 4.5 } { 4.5 + \sqrt{v} }\)

\(\frac { 6 } { 6 + \sqrt{v} }\)

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In a bolt, the plane of shear should be across the threaded portion of the shank.

Correct

Incorrect

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When a metal or alloy is cold worked,

its hardness and strength increases

it is worked below recrystallisation temperature

Both (A) and (B)

None of these

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A leaf spring in automobiles is used

to apply forces

to measure forces

to absorb shocks

to store strain energy