When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r + R) cosφ]/2

[(r² + R²) cosφ]/2

[(r + R) sinφ]/2

[(r² + R²) sinφ]/2

[(r + R) cosφ]/2

[(r² + R²) cosφ]/2

[(r + R) sinφ]/2

[(r² + R²) sinφ]/2

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Theory of Machine
Which of the following statement is correct for involute gears?

The variation in centre distance of shafts increases radial force.

A convex flank is always in contact with concave flank.

The interference is inherently absent.

The pressure angle is constant throughout the teeth engagement.

The variation in centre distance of shafts increases radial force.

A convex flank is always in contact with concave flank.

The interference is inherently absent.

The pressure angle is constant throughout the teeth engagement.

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Theory of Machine
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

-1

2

1

-1

2

1

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Theory of Machine
When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

None of these

Remains constant

Decreases

Increases

None of these

Remains constant

Decreases

Increases

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Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

1

4

2

3

1

4

2

3

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Theory of Machine
Crowning on pulleys helps

In decreasing the slip of the belt

In increasing velocity ratio

Increase belt and pulley life

For automatic adjustment of belt position so that belt runs centrally

In decreasing the slip of the belt

In increasing velocity ratio

Increase belt and pulley life

For automatic adjustment of belt position so that belt runs centrally

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Theory of Machine

Theory of Machine Which of the following statement is correct for involute gears?

Theory of Machine The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

Theory of Machine When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

Theory of Machine In its simplest form, a cam mechanism consists of following number of links

Theory of Machine Crowning on pulleys helps

Theory of Machine
Which of the following statement is correct for involute gears?

Theory of Machine
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

Theory of Machine
When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

Theory of Machine
Crowning on pulleys helps