CE- TR

Match the following notations with their meanings:

A. G(s) ---------- 1) Laplace of error signal

B. H(s) ---------- 2) Laplace of output signal

C. C(s) ---------- 3) Forward transfer function

D. E(s) ---------- 4) Feedback transfer function

• A- 2, B- 3, C- 1, D- 4

• A- 3, B- 4, C- 2, D- 1

• A- 2, B- 3, C- 4, D- 1

• A- 1, B- 2, C- 3, D- 4

If finite number of blocks are connected in series or cascade configuration, then how are the blocks combined algebraically?

• By addition

• By multiplication

• By differentiation

• By integration

The transfer function from D(s) to Y(s) is :

• 2/3s+7

• 2/3s+1

• 6/3s+7

• 2/3s+6

In the following block diagram, G1=10/s G2=10/s+1 H1=s+3, H2=1. The overall transfer function is given by :

• 10/11s2+31s+10

• 100/11s2+31s+100

• 100/11s2+31s+10

• 100/11s2+31s

Basically, poles of transfer function are the laplace transform variable values which causes the transfer function to become ___________

• Zero

• Unity

• Infinite

• Average value

If a system is subjected to step input, which type of static error coefficient performs the function of controlling steady state error?

• Position

• Velocity

• Acceleration

• Retardation

For a critically damped system the closed loop poles are

• real,unequal and negative

• complex conjugate with negative real part

• real,equal and negative

• purely imaginary

When the unit step response of a unity feedback control system having forward path transfer function G (s) =80/s(s+18)?

• Overdamped

• Critically damped

• Under damped

• Un Damped oscillatory

Given a unity feedback system with G (s) =K/ s (s+4). What is the value of K for a damping ratio of 0.5?

• 1

• 16

• 4

• 2

How can the steady state error can be reduced?

• By decreasing the type of the system

• By increasing system gain

• By decreasing the static error constant

• By increasing the input