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Machine Design

Machine Design
The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

d/6
d/8
d/4
d/2

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Machine Design
Which of the following screw thread is used for power transmission in one direction only?

Square threads
Acme threads
Buttress threads
Multiple threads

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Machine Design
Eye bolts are used for

Absorbing shock and vibrations
Transmission of power
Foundation purposes
Lifting and transportation of machines and cubicles

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Machine Design
The power transmitted by the belt drive can be increased by

All of these
Dressing the belt to increase the coefficient of friction
Increasing wrap angle by using idler pulley
Increasing the initial tension in the belt

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Machine Design
Ball bearing type screws are found in following application

Steering mechanism
Screw jack
Aeroplane engines
Crane

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Machine Design
An alien bolt is

Used in high speed components
Same as stud
Self locking bolt
Provided with hexagonal depression in head

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