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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/8
d/2
d/6
d/4

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Machine Design
For circumferential joint in boilers, the type of joint used is

Any one of the above
Butt joint with single cover plate
Lap joint with one ring overlapping the other
Butt joint with double cover plate

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Machine Design
In the assembly of pulley, key and shaft

Pulley is made the weakest
Key is made the strongest
Key is made the weakest
All the three are designed for equal strength

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Machine Design
The coefficient of friction in belt drive depends upon

Material of belt
Belt velocity
Material of pulley
Materials of belt and pulley

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Machine Design
In a horizontal flat belt drive, it is customary to use

None of these
Idler pulley
Top side of belt as slack side
Bottom side of belt as slack side

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Machine Design
In the levers of first type, the mechanical advantage is ________ one.

Equal to
Less than
More than
None of these

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