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Theory of Machine

Theory of Machine
The lead screw of a lathe with nut forms a

Rolling pair
Sliding pair
Turning pair
Screw pair

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Theory of Machine
A pulley and belt in a belt drive form a

Rolling pair
Turning pair
Cylindrical pair
Sliding pair

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Theory of Machine
The partial balancing of reciprocating parts in locomotives produces

All of these
Variation in tractive force along the line of stroke
Swaying couple
Hammer blow

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Theory of Machine
In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at

45° to each other
90° to each other
180° to each other
120° to each other

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Theory of Machine
If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

0°
180°
360°
90°

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

180° and 270°
90° and 180°
270° and 360°
45° and 225°

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