THEORY OF MACHINE QUIZ

When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Sliding pair

Spherical pair

Turning pair

Screw pair

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Which of the following statement is correct as regard to the difference between a machine and a structure?

A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work

The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another

The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only

All of these

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The steering of a ship means

Movement of a complete ship up and down in vertical plane about transverse axis

Turning of a complete ship in a curve towards right or left, while it moves forward

None of these

Rolling of a complete ship sideways

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An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be an interference between the

Tip of the pinion and flank of gear

Tip of the gear tooth and flank of pinion

Flanks of both gear and pinion

Tip of both gear and pinion

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Which type of gearing is used in steering system of an automobile?

Worm and wheel

None of the listed here

Rack and pinion

Spiral gears

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The velocity of a body moving with simple harmonic motion is __________ at the mean position.

Zero

Maximum

Minimum

None of these

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Klein's construction gives a graphic construction for

Slider-crank mechanism

Four bar chain mechanism

Acceleration polygon

Velocity polygon

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Kinematic pairs are those which have two elements that

Have surface contact

Permit relative motion

Have line contact

Are held together

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The tendency of a body to resist change from rest or motion is known as

Resisting force

Friction

Mass

Inertia

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The motion of a shaft in a circular hole is an example of

Successfully constrained motion

None of these

Completely constrained motion

Incompletely constrained motion

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