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Theory of Machine

Theory of Machine
Which of the following is an open pair?

Lead screw and nut
Cam and follower
Ball and socket joint
Journal bearing

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Theory of Machine
The example of spherical pair is

Lead screw of a lathe
Bolt and nut
Ball bearing and roller bearing
Ball and socket joint

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Theory of Machine
In order to balance the reciprocating masses,

Secondary forces and couples must be balanced
Both (A) and (B)
Primary forces and couples must be balanced
None of these

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Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

34
20
30
10

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Theory of Machine
The Coriolis component of acceleration leads the sliding velocity by

180°
45°
135°
90°

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Theory of Machine
In multi V-belt transmission, if one of the belt is broken, we have to change the

Broken belt
There is no need of changing any one as remaining belts can take care of transmission of load
All the belts
Broken belt and its adjacent belts

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