The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

Theory of Machine
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r cosθ

m.ω².r (cos 2θ/n)

m.ω².r sinθ

m.ω².r (sin 2θ/n)

m.ω².r cosθ

m.ω².r (cos 2θ/n)

m.ω².r sinθ

m.ω².r (sin 2θ/n)

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Theory of Machine
A higher pair has__________.

No contact

Point contact

None of these

Surface contact

No contact

Point contact

None of these

Surface contact

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Theory of Machine
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

Forced vibration

Damped vibration

Under damped vibration

Free vibration

Forced vibration

Damped vibration

Under damped vibration

Free vibration

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Theory of Machine
A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

m₁ r₂ = m₂ r₁

m₁ r₁ = m₂ r₂

m₁ m₂ = r₁ r₂

None of these

m₁ r₂ = m₂ r₁

m₁ r₁ = m₂ r₂

m₁ m₂ = r₁ r₂

None of these

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Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

None of these

Torsional vibration

Longitudinal vibration

Transverse vibration

None of these

Torsional vibration

Longitudinal vibration

Transverse vibration

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Theory of Machine
A system in dynamic balance implies that

The system is critically damped

The system is also statically balanced

There is no critical speed in the system

There will absolutely no wear of bearings

The system is critically damped

The system is also statically balanced

There is no critical speed in the system

There will absolutely no wear of bearings

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Theory of Machine

Theory of Machine A higher pair has__________.

Theory of Machine When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

Theory of Machine A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

Theory of Machine When the particles of a body moves perpendicular to its axis, then the body is said to have

Theory of Machine A system in dynamic balance implies that

Theory of Machine
A higher pair has__________.

Theory of Machine
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

Theory of Machine
A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

Theory of Machine
A system in dynamic balance implies that