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Machine Design

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

I-section
Any one of these
Rectangular
Elliptical

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Machine Design
In cylindrical cams, the follower moves

Along the cam axis
In a direction perpendicular to the cam axis
In any direction irrespective of cam axis
In a direction parallel to the cam axis

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Machine Design
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)

π/4 × d².τu
π/4 × d² × tτu
πd.t.τu
t.τu

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Machine Design
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

Tip of the pinion and flank of gear
Tip of both gear and pinion
Tip of the gear and flank of pinion
Flanks of both gear and pinion

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Machine Design
Guest's theory is used for

Ductile materials
Plastic materials
Brittle materials
Elastic materials

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Machine Design
A double strap butt joint (with equal straps) is

Always in double shear
Always in single shear
Either in single shear or double shear
Any one of these

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