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

View solution

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

View solution

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

View solution

Q. Derivative control action is effective?

View solution

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

View solution

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

View solution

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

View solution

Q. Modelling error may occur due to

View solution

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

View solution

Q. The units of thermal capacitance are

View solution

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

View solution

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?

View solution

Q. Which control action is also called rate control?

View solution

Q. The gain margin for a stable system

View solution

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

View solution

Q. A lead compensator is basically a

View solution

Q. In Bode diagram (log magnitude plot) of the factor 1/(1 + jωT) in the transfer function the log magnitude for ω << 1/T can be approximated by

View solution

Q. Assertion (A): The part of root locus on the real axis is not dependent on the poles and zeros which are not on the real axis.

Reason (R): Poles and zeros which are not on the real axis occur in conjugate pairs

View solution

Q. The phase angle of 1/jω is constant and equal to - 90° for all values of ω

View solution

Q. For underdamped second order systems the rise time is the time required for the response to rise from

View solution