The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

ω₁.ω₂.r

(ω₁ + ω₂)r

(ω₁ - ω₂)r

(ω₁ - ω₂)2r

ω₁.ω₂.r

(ω₁ + ω₂)r

(ω₁ - ω₂)r

(ω₁ - ω₂)2r

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Theory of Machine
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

Double

One-third

Two-third

Three times

Double

One-third

Two-third

Three times

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Theory of Machine
The purpose of a link is to

Act as a support

All of these

Guide other links

Transmit motion

Act as a support

All of these

Guide other links

Transmit motion

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Theory of Machine
Lower pairs are those which have

Elements of pairs not held together mechanically

Two elements that permit relative motion

Surface contact between the two elements when in motion

Point or line contact between the two elements when in motion

Elements of pairs not held together mechanically

Two elements that permit relative motion

Surface contact between the two elements when in motion

Point or line contact between the two elements when in motion

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Theory of Machine
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

Reduce length of effective stroke of piston

All of these

Cause withdrawing or throttling of steam

Reduce maximum opening of port to steam

Reduce length of effective stroke of piston

All of these

Cause withdrawing or throttling of steam

Reduce maximum opening of port to steam

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Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

Larger

Smaller

Smaller OR Larger

None of the listed here

Larger

Smaller

Smaller OR Larger

None of the listed here

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Theory of Machine

Theory of Machine The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

Theory of Machine The purpose of a link is to

Theory of Machine Lower pairs are those which have

Theory of Machine In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

Theory of Machine When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

Theory of Machine
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

Theory of Machine
The purpose of a link is to

Theory of Machine
Lower pairs are those which have

Theory of Machine
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.