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Machine Design

Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

180°
270°
120°
360°

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Machine Design
The railway carriage couplings have

Acme threads
Buttress threads
Knuckle threads
Square threads

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Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

Worm gearing
None of these
Helical gearing
Bevel gearing

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Machine Design
The period during which the cam follower remains at rest, when cam moves, is known as

Fixed period
Constant period
Dwell period
Idle period

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Machine Design
The application of second type levers is found in

Hand wheel of a punching press
Lever of a loaded safety valve
A pair of tongs
Handle of a hand pump

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

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

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