THEORY OF MACHINE QUIZ

Angle of action of cam is defined as the angle

Of rotation of the cam for a definite displacement of the follower

Moved by the cam from beginning of ascent to the termination of descent

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Through which the cam rotates during the period in which the follower remains in the highest position

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Throw of a cam is the maximum distance of the follower from

Pitch circle

Root circle

Prime circle

Base circle

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The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as

Rolling pair

Turning pair

Spherical pair

Sliding pair

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When the sleeve of a Porter governor moves downwards, the governor speed

Decreases

Remain unaffected

Increases

First increases and then decreases

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A body having moment of inertia o:m2 is rotating at 210 RPM and r with another body at rest having I 40 kg m2. The resultant speed after ing will be

data are insufficient

80 RPM

100 RPM

90 RPM

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Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and the motion of the parts?

Mechanisms

Theory of machines

Applied mechanics

Kinetics

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The partial balancing of reciprocating parts in locomotives produces

Swaying couple

Hammer blow

All of these

Variation in tractive force along the line of stroke

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Which of the below are inversions of slider crank mechanism?<br/>1. Oscillating cylinder engine mechanism<br/>2. Toggle mechanism<br/>3. Radial cylinder engine mechanism<br/>4. Quick return mechanism

1, 2 and 3

1, 3 and 4

1, 2 and 4

2, 3 and 4

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Whirling speed of the shaft is the speed at which

Combination of transverse and longitudinal vibration occurs

Shaft tends to vibrate in longitudinal direction

Shaft tends to vibrate vigorously in transverse direction

Torsional vibrations occur

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The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

ω/2π

ω × 2π

π/ω

2π/ω

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