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Theory of Machine

Theory of Machine
Which gear is used for connecting two coplanar and intersecting shafts?

Spur gear
None of these
Bevel gear
Helical gear

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Theory of Machine
The example of completely constrained motion is a

All of these
Motion of a piston in the cylinder of a steam engine
Motion of a square bar in a square hole
Motion of a shaft with collars at each end in a circular hole

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Theory of Machine
Which gear train is used for higher velocity ratios in a small space?

Epicyclic gear train
Simple gear train
Reverted gear train
Compound gear train

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Theory of Machine
The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to

90° and 180°
135° and 315°
270° and 360°
0° and 90°

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Theory of Machine
For fluctuating loads, well suited bearing is

Roller bearing
Thrust bearing
Ball bearing
Needle roller bearing

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Theory of Machine
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to

To start the locomotive quickly
Minimize the effect of primary forces
Minimize the effect of secondary forces
Have perfect balancing

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