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Machine Design

Machine Design
The cross-section of the arm of a bell crank lever is

Elliptical
Rectangular
I-section
Any one of these

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Machine Design
The application of third type levers is found in

Handle of a hand pump
Hand wheel of a punching press
A pair of tongs
Lever of a loaded safety valve

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Machine Design
Basic hole is one

Does not exist
Whose lower as well as upper deviations are zero
Whose upper deviation is zero
Whose lower deviation is zero

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Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

0.40 to 0.60%
0.35 to 0.45%
0.20 to 0.40%
None of these

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Machine Design
The suitable material for belt used in flour mill is

Leather
Balata gum
Canvas or cotton duck
Rubber

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Machine Design
A column of length l is fixed at both ends. The equivalent length of the column is

2 l
l/√2
l
l/2

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