The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Theory of Machine
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Effects of unbalances are proportional to the square of the speed

Effects of unbalances are directly proportional to the speed

Unbalanced forces are not dangerous at higher speeds

Unbalanced couples are caused only at higher speeds

Effects of unbalances are proportional to the square of the speed

Effects of unbalances are directly proportional to the speed

Unbalanced forces are not dangerous at higher speeds

Unbalanced couples are caused only at higher speeds

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Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Four times

Two times

Sixteen times

Eight times

Four times

Two times

Sixteen times

Eight times

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Theory of Machine
In a hydrodynamic journal bearing, there is

A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing

A thick film of lubricant between the journal and the bearing

No lubricant between the journal and the bearing

A forced lubricant between the journal and the bearing

A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing

A thick film of lubricant between the journal and the bearing

No lubricant between the journal and the bearing

A forced lubricant between the journal and the bearing

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Theory of Machine
In a spring controlled governor, when the controlling force ____ as the radius of rotation increases, it is said to be a stable governor.

None of the listed here

Remains constant

Decreases

Increases

None of the listed here

Remains constant

Decreases

Increases

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Theory of Machine
In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.

Greater than

Less than

Equal to

None of these

Greater than

Less than

Equal to

None of these

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Theory of Machine
In under damped vibrating system, the amplitude of vibration

Decreases linearly with time

Increases exponentially with time

Decreases exponentially with time

Increases linearly with time

Decreases linearly with time

Increases exponentially with time

Decreases exponentially with time

Increases linearly with time

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Theory of Machine

Theory of Machine The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Theory of Machine The secondary unbalanced force is maximum __________ in one revolution of the crank.

Theory of Machine In a hydrodynamic journal bearing, there is

Theory of Machine In a spring controlled governor, when the controlling force ____ as the radius of rotation increases, it is said to be a stable governor.

Theory of Machine In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.

Theory of Machine In under damped vibrating system, the amplitude of vibration

Theory of Machine
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Theory of Machine
In a hydrodynamic journal bearing, there is

Theory of Machine
In a spring controlled governor, when the controlling force ____ as the radius of rotation increases, it is said to be a stable governor.

Theory of Machine
In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.

Theory of Machine
In under damped vibrating system, the amplitude of vibration