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

Unbalanced forces are not dangerous at higher speeds

Effects of unbalances are proportional to the square of the speed

Unbalanced couples are caused only at higher speeds

Effects of unbalances are directly proportional to the speed

Unbalanced forces are not dangerous at higher speeds

Effects of unbalances are proportional to the square of the speed

Unbalanced couples are caused only at higher speeds

Effects of unbalances are directly proportional to the speed

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Theory of Machine
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.

Two-third

Whole

Three-fourth

One-half

Two-third

Whole

Three-fourth

One-half

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Theory of Machine
The pair is known as a higher pair, when the relative motion between the elements of a pair is

Partly turning and partly sliding

Turning only

Sliding only

Rolling only

Partly turning and partly sliding

Turning only

Sliding only

Rolling only

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. (n + 1)/n

ω²r. n/(n + 1)

ω²r. n/(n - 1)

ω²r. (n - 1)/n

ω²r. (n + 1)/n

ω²r. n/(n + 1)

ω²r. n/(n - 1)

ω²r. (n - 1)/n

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Tangential component only

Coriolis component only

Radial component only

Radial and tangential components both

Tangential component only

Coriolis component only

Radial component only

Radial and tangential components both

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Theory of Machine
The two elements of a pair are said to form a higher pair, when they

Have a line or point contact when in motion

Have a surface contact when in motion

Permit relative motion

Are kept in contact by the action of external forces, when in motion

Have a line or point contact when in motion

Have a surface contact when in motion

Permit relative motion

Are kept in contact by the action of external forces, when in motion

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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 a reciprocating engine, usually __________ of the reciprocating masses are balanced.

Theory of Machine The pair is known as a higher pair, when the relative motion between the elements of a pair is

Theory of Machine When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

Theory of Machine When a point moves along a straight line, its acceleration will have

Theory of Machine The two elements of a pair are said to form a higher pair, when they

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 a reciprocating engine, usually __________ of the reciprocating masses are balanced.

Theory of Machine
The pair is known as a higher pair, when the relative motion between the elements of a pair is

Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

Theory of Machine
When a point moves along a straight line, its acceleration will have

Theory of Machine
The two elements of a pair are said to form a higher pair, when they