A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

G.I₂

G².I₂

I₂/G

I₂/G²

G.I₂

G².I₂

I₂/G

I₂/G²

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Theory of Machine
The contact ratio is given by

(Length of the arc of contact)/(Circular pitch)

(Length of path of recess)/(Circular pitch)

(Length of the path of approach)/(Circular pitch)

(Length of the arc of approach)/cosφ

(Length of the arc of contact)/(Circular pitch)

(Length of path of recess)/(Circular pitch)

(Length of the path of approach)/(Circular pitch)

(Length of the arc of approach)/cosφ

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Theory of Machine
To obviate axial thrust, following gear drive is used

Mutter gears

Single helical gear in which one of the teeth of helix angle a is more

Double helical gears having opposite teeth

Double helical gears having identical teeth

Mutter gears

Single helical gear in which one of the teeth of helix angle a is more

Double helical gears having opposite teeth

Double helical gears having identical teeth

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Theory of Machine
Which of the following governor is used to drive a gramophone?

Watt governor

Porter governor

Hartnell governor

Pickering governor

Watt governor

Porter governor

Hartnell governor

Pickering governor

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Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.2

0.8

0.4

0.6

0.2

0.8

0.4

0.6

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Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves

None of these

Perpendicular to its axis

Parallel to its axis

In a circle about its axis

None of these

Perpendicular to its axis

Parallel to its axis

In a circle about its axis

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Theory of Machine

Theory of Machine A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

Theory of Machine The contact ratio is given by

Theory of Machine To obviate axial thrust, following gear drive is used

Theory of Machine Which of the following governor is used to drive a gramophone?

Theory of Machine In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

Theory of Machine Longitudinal vibrations are said to occur when the particles of a body moves

Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

Theory of Machine
The contact ratio is given by

Theory of Machine
To obviate axial thrust, following gear drive is used

Theory of Machine
Which of the following governor is used to drive a gramophone?

Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves