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Control Systems

Control Systems
Force balancing equation of a mass element is (where, x = displacement)

 M *x
 M dx/dt
 any of the above
 M d2x/dt2

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Control Systems
Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is

 RL Circuit.
 RLC circuit.
 LC circuit.
 RC circuit.

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Control Systems
A box which tells the effect of inputs on control sub system is known as

 Logical box.
 Decision box.
 Data Box.
 State box.

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Control Systems
Given the Laplace transform of f(t) = F(s), the Laplace transform of (f(t)e-at) is equal to

 F(s+a)
 e-as*F(s)
 F(s)/(s+a)
 eas*F(s)

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Control Systems
If two blocks having gains A and B respectively are in series connection, find the resultant gain using block diagram reduction technique?

 A*B
 A/B
 A+B
 A-B

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Control Systems
The maximum phase lag occurs at the ------------------- of the two corner frequencies?

 arithmetic mean
 either 1 or 2
 geometric mean
None of these

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