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Theory of Machine

Theory of Machine
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

One
π
π/2
Zero

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Theory of Machine
A kinematic chain requires at least

2 links and 3 turning pairs
4 links and 4 turning pairs
5 links and 4 turning pairs
3 links and 4 turning pairs

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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

G².I₂
I₂/G²
I₂/G
G.I₂

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Theory of Machine
The lead screw of a lathe with nut forms a

Screw pair
Rolling pair
Sliding pair
Turning pair

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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

I₂/G
G.I₂
I₂/G²
G².I₂

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Theory of Machine
The advantage of the piston valve over the slide valve is that in the former case

Power absorbed is less
Wear is less
Both wear and power absorbed are low
The pressure developed being high provides tight sealing

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