Q. Assertion (A): Laplace transform of impulse function is equal to area under the impulse.

Reason (R): An impulse function whose area is unity is called unit impulse function.

View solution

Q. Optical encoders most commonly used in control systems are

View solution

Q. A second order system exhibits 100% overshoot. The damping ratio is

View solution

Q. The log magnitude curve for a constant gain K is a horizontal straight line at a magnitude 20 log K dB.

View solution

Q. Transfer functions of even complicated components can be found by frequency response tests.

View solution

Q. Assertion (A): Feedback control systems offer more accurate control than open loop systems.

Reason (R): The feedback path establishes a link for comparison of input and output and subsequent error correction.

View solution

Q. Examine the following statements

1. Pneumatic systems are fire proof.
2. Pneumatic systems are explosion proof.
3. Hydraulic systems are explosion proof.
4. Hydraulic systems are fire proof.

Which of the above statements are correct?

View solution

Q. The addition of a zero to the open loop transfer function

View solution

Q. Assertion (A): For a given system only one of the static error constants is finite and significant.

Reason (R): If finite static error constant is large, the loop gain becomes smaller as ω approaches zero.

View solution

Q. Which of the following represents constant magnitude locus for M = 1?

View solution

Q. Assertion (A): A synchro control transformer has nearly constant impedance across its rotor terminals.

Reason (R): Rotor of a synchro control transformer is cylindrical so as to give uniform flux distribution.

View solution

Q. Generally a servomotor operates at

View solution

Q. If C is thermal capacitance, m is mass of liquid and c is specific heat, then

View solution

Q. In a two phase servomotor, if R is rotor resistance, X is rotor reactance, L is rotor length D is rotor diameter then

View solution

Q. Integral error compensation changes a second order system to

View solution

Q. Assertion (A): If integral control action is included in the controller the offset can be eliminated.

Reason (R): Integral control action may lead to oscillatory response.

View solution

Q. An ac tachometer has a drag cup construction so that

View solution

Q. If G(s)H(S) = K(s+6)/(s+3)(s+5) the breakaway and break in points in the root locus are located at

View solution

Q. The constant M loci on G(s) plane are a family of circles.

View solution

Q. The ac motor used in servo applications is

View solution