In involute gears, the pressure angle is

Theory of Machine
In involute gears, the pressure angle is

Always variable

Always constant

Dependent on the size of teeth

Dependent on the size of gears

Always variable

Always constant

Dependent on the size of teeth

Dependent on the size of gears

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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 anticlockwise 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 magnitude of velocities of the points on a rigid link is

Directly proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

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Theory of Machine
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

To raise the bow and lower the stern

To raise the stern and lower the bow

To move the ship towards port side

To move the ship towards starboard

To raise the bow and lower the stern

To raise the stern and lower the bow

To move the ship towards port side

To move the ship towards starboard

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Theory of Machine
The Coriolis component of acceleration acts

At 45° to the sliding surface

Along the sliding surface

Perpendicular to the sliding surface

Parallel to the sliding surface

At 45° to the sliding surface

Along the sliding surface

Perpendicular to the sliding surface

Parallel to the sliding surface

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Theory of Machine
The dynamic friction is the friction experienced by a body, when the body

Is at rest

Is in motion

None of these

Just begins to slide over the surface of the other body

Is at rest

Is in motion

None of these

Just begins to slide over the surface of the other body

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Theory of Machine

Theory of Machine In involute gears, the pressure angle is

Theory of Machine The magnitude of velocities of the points on a rigid link is

Theory of Machine When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

Theory of Machine The Coriolis component of acceleration acts

Theory of Machine The dynamic friction is the friction experienced by a body, when the body

Theory of Machine
In involute gears, the pressure angle is

Theory of Machine
The magnitude of velocities of the points on a rigid link is

Theory of Machine
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

Theory of Machine
The Coriolis component of acceleration acts

Theory of Machine
The dynamic friction is the friction experienced by a body, when the body