THEORY OF MACHINE QUIZ

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

2, 3 and 4

1, 2 and 4

1, 3 and 4

1, 2 and 3

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Pulley in a belt drive acts as

Rolling pair

Sliding pair

Turning pair

Cylindrical pair

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The flank of the tooth is the surface of the tooth __________ the pitch surface.

At

None of these

Above

Below

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In a single slider crank chain

Each of the four pairs is a turning pair

Two are turning pairs and two are sliding pairs

One is a turning pair and three are sliding pairs

Three are turning pairs and one is a sliding pair

TRUE ANSWER : ?
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Scotch yoke mechanism is used to generate

Inversions

Sine functions

Logarithms

Square roots

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In a gear having involute teeth, the normal to the involute is a tangent to the

Base circle

Addendum circle

Dedendum circle

Pitch circle

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In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Equal to 1

Greater than 2

Less than 2

Equal to 2

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Power of a governor is the

Mean force exerted at the sleeve for maximum equilibrium speed

Work-done at the sleeve for maximum equilibrium speed

Mean force exerted at the sleeve for a given percentage change of speed

None of these

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The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is _________ as compared to uniform wear.

Same

Less

None of the listed here

More

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For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

cosφ

cosecφ

secφ

sinφ

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