Q. A thermometer requires 1 minute to indicate 98% of its final response to a step input. If it is a first order system the time constant is

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Q. Assertion (A): A slight change in pole-zero configuration can cause only minor changes in root locus configuration.

Reason (R): Asymptotes show the behaviour of root loci for |s| >> 1

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Q. In a second order system ωn = 10 rad/sec and ζ = 0.1, then ωd =

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Q. In a second order undamped system, the poles are on

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Q. An open loop system has a forward path transfer function (42.25)/s(s + 6.5). The unit step response of the system starting from rest will have its maximum value at a time equal to

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Q. Which of the following is not a necessary advantage of negative feedback system?

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Q. In position control system the device used for providing rate feedback voltage is

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Q. Derivative control action is effective?

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Q. The phase angle curve of G(jω) H(jω) can be drawn

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Q. The most commonly used devices for differencing and amplification, in control systems, are

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Q. In Bode method of stability analysis, the error curve is not symmetric about corner frequency.

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Q. Modelling error may occur due to

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Q. In Bode diagrams an octave is a frequency band from

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Q. The units of thermal capacitance are

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Q. Nichols chart consists of M and N locii in log magnitude versus phase diagram.

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Q. Examine the following statements

1. Air and gases are compressible.
2. Air, gases and some liquids are compressible.
3. Oil can function as hydraulic fluid as well as lubricator.

Which of the above statements are correct?

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Q. Which control action is also called rate control?

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Q. The gain margin for a stable system

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Q. For overdamped systems a quadratic factor in transfer function can be replaced by two first order factors with real poles

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Q. A lead compensator is basically a

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