The secondary 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 secondary 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 (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)

m.ω².r sinθ

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Theory of Machine
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is

Less than 2

Equal to 2

Equal to 1

Greater than 2

Less than 2

Equal to 2

Equal to 1

Greater than 2

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Theory of Machine
Pulley in a belt drive acts as

Cylindrical pair

Sliding pair

Rolling pair

Turning pair

Cylindrical pair

Sliding pair

Rolling pair

Turning pair

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Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r² + R²) cosφ]/2

[(r + R) cosφ]/2

[(r + R) sinφ]/2

[(r² + R²) sinφ]/2

[(r² + R²) cosφ]/2

[(r + R) cosφ]/2

[(r + R) sinφ]/2

[(r² + R²) sinφ]/2

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Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

n(n - 1)/2

n

n - 1

n/2

n(n - 1)/2

n

n - 1

n/2

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Theory of Machine
When the primary direct crank of a reciprocating engine makes an angle of 'θ' with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.

2θ

θ

4θ

θ/2

2θ

θ

4θ

θ/2

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Theory of Machine

Theory of Machine The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is

Theory of Machine Pulley in a belt drive acts as

Theory of Machine The total number of instantaneous centers for a mechanism consisting of n links are

Theory of Machine When the primary direct crank of a reciprocating engine makes an angle of 'θ' with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.

Theory of Machine
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is

Theory of Machine
Pulley in a belt drive acts as

Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

Theory of Machine
When the primary direct crank of a reciprocating engine makes an angle of 'θ' with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.