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 sinθ

m.ω².r cosθ

m.ω².r (sin 2θ/n)

m.ω².r (cos 2θ/n)

m.ω².r sinθ

m.ω².r cosθ

m.ω².r (sin 2θ/n)

m.ω².r (cos 2θ/n)

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Theory of Machine
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

There is no such relationship

Greater than sum of other two

Equal to sum of other two

Less than sum of other two

There is no such relationship

Greater than sum of other two

Equal to sum of other two

Less than sum of other two

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Theory of Machine
The frequency of oscillation of a torsional pendulum is

r/2πk. √(g/l)

2πk/r. √(g/l)

r/2πk. √(l/g)

2πr/k. √(g/l)

r/2πk. √(g/l)

2πk/r. √(g/l)

r/2πk. √(l/g)

2πr/k. √(g/l)

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Theory of Machine
The train value of a gear train is

Reciprocal of velocity ratio of a gear train

Always less than unity

Always greater than unity

Equal to velocity ratio of a gear train

Reciprocal of velocity ratio of a gear train

Always less than unity

Always greater than unity

Equal to velocity ratio of a gear train

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Theory of Machine
Lower pairs are those which have

Point or line contact between the two elements when in motion

Elements of pairs not held together mechanically

Two elements that permit relative motion

Surface contact between the two elements when in motion

Point or line contact between the two elements when in motion

Elements of pairs not held together mechanically

Two elements that permit relative motion

Surface contact between the two elements when in motion

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Theory of Machine
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called

Addendum

Working depth

Clearance

Dedendum

Addendum

Working depth

Clearance

Dedendum

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Theory of Machine

Theory of Machine In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

Theory of Machine The frequency of oscillation of a torsional pendulum is

Theory of Machine The train value of a gear train is

Theory of Machine Lower pairs are those which have

Theory of Machine The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called

Theory of Machine
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

Theory of Machine
The frequency of oscillation of a torsional pendulum is

Theory of Machine
The train value of a gear train is

Theory of Machine
Lower pairs are those which have

Theory of Machine
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called