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Theory of Machine

Theory of Machine
The behaviour of gases can be fully determined by

4 laws
1 law
2 laws
3 laws

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Theory of Machine
Length of arc of contact is given by

Arc of approach - Arc of recess
Arc of approach / Arc of recess
Arc of approach × Arc of recess
Arc of approach + Arc of recess

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Theory of Machine
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at

Moderate speed
Any one of these
Highs peed
Slow speed

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Theory of Machine
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)

0.571/√δ
0.4985/√δ
0.6253/√δ
0.5615/√δ

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Theory of Machine
The C.G. of a link in any mechanism would experience

Linear acceleration
Both angular and linear accelerations
No acceleration
Angular acceleration

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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)

[(r + R) sinφ]/2
[(r + R) cosφ]/2
[(r² + R²) cosφ]/2
[(r² + R²) sinφ]/2

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