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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

Half
Double
Same
None of these

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Machine Design
The material generally used for aircraft components is

High speed steel
Aluminium
Stainless steel
Mild steel

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Any one of the above
Butt joint with single cover plate
Lap joint with one ring overlapping the other
Butt joint with double cover plate

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

Less than 50%
More than 50%
None of these
Equal to 50%

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Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.6
0.25
0.5
0.2

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Machine Design
Which of the following formula is used in designing a connecting rod?

Euler's formula
Rankine's formula
Johnson's parabolic formula
Johnson's straight line formula

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