CONTROL SYSTEMS QUIZ

Time taken for the response to rise from zero to 100 % for very first time is called

Rise time.

Delay time.

Peak time.

Settling time.

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When the input to a system was with drawn at t = 0, its output was found to decrease exponentially from 1000 units to 500 units in 1.386 sec. The time constant of the system is

0.693.

1.386.

2.000.

0.500.

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A cascade of three linear time invariant systems is causal and unstable. From this we conclude that

at least one system is causal and all systems are unstable.

each system in the cascade is individually caused and unstable.

at least one system is unstable and at least one system is causal.

the majority are unstable and the majority are causal.

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Differentiation of parabolic response is a -------------- response?

ramp

parabolic

impulse

step

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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

RC circuit.

LC circuit.

RL Circuit.

RLC circuit.

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Find the angles of asymptotes of the open loop transfer function G(s) = k(s + 1)/((s(s+2)(s+4)?

90°,270°

60°,240°

90°,180°

0°, 180°

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Error constants of a system are a measure of

transient state response.

steady state response as well as transient state response.

steady state response.

relative stability.

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Lead network is used to

improve transient response.

improve steady state response.

both A and C.

increase bandwidth.

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Which of the following statement is/are true statements?

The steady state analysis depends on type of the system

Type of the system is obtained from open loop transfer function

All of these

Transient state analysis depends on order of the system

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The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

0

3/5

1/4

3/9

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