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 couples are caused only at higher speeds

Unbalanced forces are not dangerous at higher speeds

Effects of unbalances are directly proportional to the speed

Effects of unbalances are proportional to the square of the speed

Unbalanced couples are caused only at higher speeds

Unbalanced forces are not dangerous at higher speeds

Effects of unbalances are directly proportional to the speed

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 < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Zero

Greater than unity

Less than unity

Equal to unity

Zero

Greater than unity

Less than unity

Equal to unity

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Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Five

Six

Seven

Four

Five

Six

Seven

Four

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Theory of Machine
Open pairs are those which have

Elements of pairs not held together mechanically

Surface contact between the two elements when in motion

Point or line contact between the two elements when in motion

Two elements that permit relative motion

Elements of pairs not held together mechanically

Surface contact between the two elements when in motion

Point or line contact between the two elements when in motion

Two elements that permit relative motion

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Theory of Machine
The maximum or minimum value of the swaying couple is

± a (1 - c) m.ω².r

± (a/√2) (1 - c) m.ω².r

± 2a (1 - c) m.ω².r

± c.m.ω².r

± a (1 - c) m.ω².r

± (a/√2) (1 - c) m.ω².r

± 2a (1 - c) m.ω².r

± c.m.ω².r

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Theory of Machine
In a pantograph, all the pairs are

Turning pairs

Self-closed pairs

Sliding pairs

Spherical pairs

Turning pairs

Self-closed pairs

Sliding pairs

Spherical pairs

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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 < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Theory of Machine A rotary internal combustion engine has __________ cylinders.

Theory of Machine Open pairs are those which have

Theory of Machine The maximum or minimum value of the swaying couple is

Theory of Machine In a pantograph, all the pairs are

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 < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Theory of Machine
Open pairs are those which have

Theory of Machine
The maximum or minimum value of the swaying couple is

Theory of Machine
In a pantograph, all the pairs are