AUTOMATIC CONTROL SYSTEMS QUIZ

Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator

All

1 and 2

3 and 4

1, 2 and 3

TRUE ANSWER : ?
YOUR ANSWER : ?

Bandwidth is proportional to speed of response.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

If poles lie in first quadrant, damping ratio is

less than 1

1

Zero

More than 1

TRUE ANSWER : ?
YOUR ANSWER : ?

DC tachogenerator can be used in

Both A and B

Position control system

Neither A nor B

Speed control system

TRUE ANSWER : ?
YOUR ANSWER : ?

Nichols chart consists of

None of these

Constant phase angle loci

Magnitude and phase angle loci in log-magnitude versus phase diagram

Constant magnitude loci

TRUE ANSWER : ?
YOUR ANSWER : ?

For type 1 system the velocity lag error is

Inversely proportional to bandwidth of system

Inversely proportional to gain constant

Independent of gain constant

Directly proportional to gain constant

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following features is not associated with Nichols chart?

(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)

M loci are centred about (0 dB, -180°) point

The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system

It is symmetric about -180°

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used to obtain output position in a position control system?

Strain gauge

Synchro

Load cell

Thermistor

TRUE ANSWER : ?
YOUR ANSWER : ?

For any transfer function, the constant phase angle loci are

A family of circles

Neither (a) nor (b)

A family of straight lines

Either (a) or (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Temperature is analogous to

Charge

None of these

Voltage

Flux

TRUE ANSWER : ?
YOUR ANSWER : ?