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Machine Design

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

Elliptical
Rectangular
Any one of these
I-section

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Machine Design
The shock absorbing capacity of a bolt may be increased by

Making the shank diameter equal to core diameter of thread
Decreasing its shank diameter
Tightening the bolt properly
Increasing its shank diameter

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Machine Design
The face angle of a bevel gear is equal to

Pitch angle + dedendum angle
Pitch angle - dedendum angle
Pitch angle - addendum angle
Pitch angle + addendum angle

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Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Tension
Compression
All of these
Shear

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Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

1.5 × diameter of bolt
0.75 × diameter of bolt
1.25 × diameter of bolt
Diameter of bolt

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Crown bevel gears
Angular bevel gears
Internal bevel gears
Mitre gears

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