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)

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) sinφ]/2

[(r + R) sinφ]/2

[(r + R) cosφ]/2

[(r² + R²) cosφ]/2

[(r² + R²) sinφ]/2

[(r + R) sinφ]/2

[(r + R) cosφ]/2

[(r² + R²) cosφ]/2

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Theory of Machine
The partial balancing means

Best balancing of engines

All of these

Balancing partially revolving masses

Balancing partially reciprocating masses

Best balancing of engines

All of these

Balancing partially revolving masses

Balancing partially reciprocating masses

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

95 mm

Slightly more than 45 mm

45 mm

Slightly less than 45 mm

95 mm

Slightly more than 45 mm

45 mm

Slightly less than 45 mm

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Theory of Machine
Which type of gear train is used in clock mechanism to join hour hand and minute hand?

Epicyclic gear train

Reverted gear train

Simple gear train

Compound gear train

Epicyclic gear train

Reverted gear train

Simple gear train

Compound gear train

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Theory of Machine
Open pairs are those which have

Elements of pairs not held together mechanically

Two elements that permit relative motion

Point or line contact between the two elements when in motion

Surface contact between the two elements when in motion

Elements of pairs not held together mechanically

Two elements that permit relative motion

Point or line contact between the two elements when in motion

Surface contact between the two elements when in motion

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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 sinθ

m.ω².r (sin 2θ/n)

m.ω².r (cos 2θ/n)

m.ω².r cosθ

m.ω².r sinθ

m.ω².r (sin 2θ/n)

m.ω².r (cos 2θ/n)

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Theory of Machine

Theory of Machine The partial balancing means

Theory of Machine In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

Theory of Machine Which type of gear train is used in clock mechanism to join hour hand and minute hand?

Theory of Machine Open pairs are those which have

Theory of Machine
The partial balancing means

Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

Theory of Machine
Which type of gear train is used in clock mechanism to join hour hand and minute hand?

Theory of Machine
Open pairs are those which have