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Theory of Machine

Theory of Machine
When a ship travels in a sea, which of the effect is more dangerous

All of these
Rolling
Steering
Pitching

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Theory of Machine
The Ackermann steering mechanism is preferred to the Davis type in automobiles because

The former is having turning pair
The former is mathematically accurate
The former is most rigid
The former is most economical

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Theory of Machine
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

cotφ - cotα = c/b
cosφ - sinα = c/b
sinφ + sinα = b/c
tanφ + cotα = b/c

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Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

G.I₂
I₂/G
I₂/G²
G².I₂

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Theory of Machine
The maximum or minimum value of the swaying couple is

± 2a (1 - c) m.ω².r
± c.m.ω².r
± (a/√2) (1 - c) m.ω².r
± a (1 - c) m.ω².r

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Theory of Machine
A cam mechanism imparts following motion

Reciprocating
Rotating
Oscillating
All of these

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