CONTROL SYSTEMS QUIZ

When the system gain is doubled the gain margin becomes?

2 times

1/2 times

Remains unaffected

None of these

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Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

Velocity (v) ----------------- Voltage (V)

All of these

Force (f) --------------------- Current (i)

Spring element (K) --------- Inverse inductance (1/L)

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The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

3.

2.

0.

4.

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The characteristic equation has the following roots for over damped stable system?

-2±j4

-2,-4

-2,2

-2,-2

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If the bandwidth of the system is very large, the system response is

faster

slower

None of these

independent of bandwidth

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Name test signals used in time response analysis?

Impulse.

All of B, C, D.

Unit step.

Unit ramp.

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The impulse response of an initally relaxed linear system is e-2tu(t). To produce a response of te-2tu(t), the input must be equal to

e-tu(t).

(0.5)e-2tu(t).

e-2tu(t).

2e-tu(t).

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The device necessarily used for automatic temperature control in a furnace is

Thermocouple.

Any of above.

Auto-transformer.

Thermostat.

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The unit step error coefficient of a system with unity feedback is

0.

1.

1/6.

infinity.

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The graph of an electrical network has N nodes and B branches. The number of links, L with respect to the choice of a tree, is given by

B + N.

N - B + 1.

B - N + 1.

N - 2B - 1.

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