CONTROL SYSTEMS QUIZ

By using which of the following elements, mechanical translational systems are obtained?

mass element

dash-pot

All of these

spring element

TRUE ANSWER : ?
YOUR ANSWER : ?

The magnitude of a transfer function G(jω)H(jω) at gain cross over frequency is

0

1

any of the above

infinity

TRUE ANSWER : ?
YOUR ANSWER : ?

Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

3.

2.

1.

0.

TRUE ANSWER : ?
YOUR ANSWER : ?

Lead network is used to

improve steady state response.

improve transient response.

both A and C.

increase bandwidth.

TRUE ANSWER : ?
YOUR ANSWER : ?

For the polynomial , find the number of roots which lie on the right half of s-plane?

2

0

4

1

TRUE ANSWER : ?
YOUR ANSWER : ?

In frequency response analysis of second order system, the error at corner frequency is

-10 logξ

-20 log2ξ

20 log2ξ

10 logξ

TRUE ANSWER : ?
YOUR ANSWER : ?

The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

2/(s² + 3s + 2)

1/(s² + 3s + 2)

2/(s² + s + 2)

1/(s² + s + 2)

TRUE ANSWER : ?
YOUR ANSWER : ?

When writing a transfer function which of the following loops are not valid loops?

Self loops at input node.

Neither 1 nor 2.

Both 1 and 2.

Self loops at output node.

TRUE ANSWER : ?
YOUR ANSWER : ?

Find the Laplace transform for sinωt?

1/s²

ω/(s²+ω²)

s/(s²+ω²)

1/s

TRUE ANSWER : ?
YOUR ANSWER : ?

The characteristic equation of a control system is given by What are the angles of asymptotes of the root loci for k ≥ 0?

0°, 120°, 240°

120°, 180°, 240°

0°, 180°, 300°

60°, 180°, 300°

TRUE ANSWER : ?
YOUR ANSWER : ?

↑