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 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

Effects of unbalances are proportional to the square of the speed

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

270°

180°

0°

90°

270°

180°

0°

90°

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Theory of Machine
Angle of dwell of cam is defined as the angle

Through which the cam rotates during the period in which the follower remains in the highest position

During which the follower returns to its initial position

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Of rotation of the cam for definite displacement of the follower

Through which the cam rotates during the period in which the follower remains in the highest position

During which the follower returns to its initial position

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Of rotation of the cam for definite displacement of the follower

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Theory of Machine
Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross belt drive. The length of the belt is

π (r₁ - r₂) + [(r₁ + r₂)²/x] + 2x

π (r₁ - r₂) + [(r₁ - r₂)²/x] + 2x

π (r₁ + r₂) + [(r₁ - r₂)²/x] + 2x

π (r₁ + r₂) + [(r₁ + r₂)²/x] + 2x

π (r₁ - r₂) + [(r₁ + r₂)²/x] + 2x

π (r₁ - r₂) + [(r₁ - r₂)²/x] + 2x

π (r₁ + r₂) + [(r₁ - r₂)²/x] + 2x

π (r₁ + r₂) + [(r₁ + r₂)²/x] + 2x

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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
Inertia force acts

None of the listed here

Opposite to the direction of acceleration force

Perpendicular to the acceleration force

Along the direction of acceleration force

None of the listed here

Opposite to the direction of acceleration force

Perpendicular to the acceleration force

Along the direction of acceleration force

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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 In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

Theory of Machine Angle of dwell of cam is defined as the angle

Theory of Machine Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross belt drive. The length of the belt is

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 Inertia force acts

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
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

Theory of Machine
Angle of dwell of cam is defined as the angle

Theory of Machine
Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross belt drive. The length of the belt is

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
Inertia force acts