Q. In Bode analysis the correction at corner frequency is 3 dB.

View solution

Q. In a proportional plus integral control action

View solution

Q. Which dc servomotor has minimum inertia?

View solution

Q. Gas flow resistance is defined as

View solution

Q. Examine the following statements

1. A small size hydraulic actuator can develop good torque.
2. It is easy to maintain a hydraulic system leak proof.
3. Both linear and rotatary hydraulic actuators are available.
4. Hydraulic power is more easily available than electric power.

Which of the above statements are correct?

View solution

Q. Consider the following statements regarding negative feedback

1. It increases system gain
2. It improves sensitivity
3. It improves system stability

Which of these are not correct?

View solution

Q. Which of the following are applications of position control systems?

View solution

Q. Assertion (A): Increasing the system gain improves steady state behaviour but may result in instability.

Reason (R): A compensator is inserted into a system to ensure specified performance.

View solution

Q. Assertion (A): Inverse Laplace transform can be found from P(s) by inversion integral.

Reason (R): The function f(t) is assumed to be zero for t < 0.

View solution

Q. Assertion (A): Derivative control action is also called rate control and has an anticipatory character.

Reason (R): Derivative control amplifies noise signals.

View solution

Q. Assertion (A): When a PID controller is added to a system, the peak overshoot to step input cannot be determined easily.

Reason (R): Use of PID controller introduces a zero in the forward path.

View solution

Q. The slope of log magnitude asymptote changes by - 40 dB/ decade at a certain frequency and the error between asymptote and actual curve is - 6 dB. This means that

View solution

Q. Friction forces acts in a direction

View solution

Q. For a second order system delay time td is the time required to reach

View solution

Q. Coulomb friction is

View solution

Q. The damping ratio of a pair of complex poles when expressed in terms of angle θ measured from jω axis equal to

View solution

Q. The slope of log magnitude curve changes by - 40 dB/decade at a certain frequency and the error between asymptote and actual curve is positive. This means that

View solution

Q. A system has high gain and phase margin. The system is

View solution

Q. A proportional controller is basically

View solution

Q. Nyquist stability criterion is based on a theorem from the theory of complex variables.

View solution