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)2r

ω₁.ω₂.r

(ω₁ - ω₂)r

(ω₁ + ω₂)r

(ω₁ - ω₂)2r

ω₁.ω₂.r

(ω₁ - ω₂)r

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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°

90°

180°

360°

0°

90°

180°

360°

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Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Positive during major portion of the stroke

Negative during major portion of the stroke

Negative throughout

Positive throughout

Positive during major portion of the stroke

Negative during major portion of the stroke

Negative throughout

Positive throughout

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

Applied mechanics

Theory of machines

Mechanisms

Kinetics

Applied mechanics

Theory of machines

Mechanisms

Kinetics

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Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

(m + M)/M

m/(m + M)

M/(m + M)

(m + M)/m

(m + M)/M

m/(m + M)

M/(m + M)

(m + M)/m

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Theory of Machine
A body is said to be under forced vibrations, when

No external force acts on a body, after giving it an initial displacement

None of these

A body vibrates under the influence of external force

There is a reduction in amplitude after every cycle of vibration

No external force acts on a body, after giving it an initial displacement

None of these

A body vibrates under the influence of external force

There is a reduction in amplitude after every cycle of vibration

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Theory of Machine

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

Theory of Machine In a four stroke I.C. engine, the turning moment during the compression stroke is

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

Theory of Machine The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

Theory of Machine A body is said to be under forced vibrations, when

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

Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

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

Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

Theory of Machine
A body is said to be under forced vibrations, when