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Machine Design

Machine Design
For tight leakage joints, following type of thread is best suited

Square
Buttress
NPT (national pipe threads).
Metric

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Machine Design
A self locking screw has

Fine threads
Hole for inserting split pin
Coefficient of friction is greater than tangent of load angle
Course threads

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Machine Design
In V-belt drive, belt touches

At sides only
Both at bottom and sides
At bottom
Could touch anywhere

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Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Torsional stiffness of each shaft is the same
Torque in each shaft is the same
Angle of twist of each shaft is the same
Shear stress in each shaft is the same

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Machine Design
Stress concentration in static loading is more serious in

Brittle materials
Equally serious in both cases
Depends on other factors
Ductile materials

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Machine Design
In cylindrical cams, the follower moves

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

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