Control System MCQs

Question 1

In a control system, friction coefficient is usually kept low to

Accepted Answer

minimize the velocity-lag error of the system

Answer

maximize the velocity-lag error of the system

Answer

maximize the speed of response of the system

Answer

minimize the time constant of the system

Question 2

AC system are usually preferred to the DC systems in control applications because

Accepted Answer

all of these

Answer

AC systems are cheaper

Answer

AC systems are more stable

Answer

AC systems have better performance characteristics and are smaller in size k

Question 3

For large power control applications

Accepted Answer

DC systems are more suited

Answer

AC systems are more suited

Answer

both AC and DC systems may be used efficiently

Answer

neither AC nor DC system is preferred

Question 4

Principle advantage of hydraulic system over electrical system is that the former has

Accepted Answer

smaller size for the same power

Answer

smaller response time

Answer

greater flexibility of operation

Answer

none of these

Question 5

In hydraulic control system, power is transmit-ted through

Accepted Answer

fluid under pressure

Answer

mechanical gears

Answer

shafts

Answer

none of these

Question 6

Time sharing of an expensive control system can be achieved by using

Accepted Answer

a sampled data control system

Answer

an AC control system

Answer

an analog control system

Answer

none of these

Question 7

Linear differential transformer is an

Accepted Answer

electrostatic device

Answer

electrical device

Answer

electromechanical device

Answer

electromagnetic device

Question 8

Which of the following devices is used for conversion of coordinates?

Accepted Answer

synchros resolver

Answer

synchros

Answer

rnicrosyn

Answer

synchro transformer

Question 9

Most common use of synchros is

Accepted Answer

for transmission of angular data

Answer

as error detector

Answer

for transmission of arithmetic data

Answer

for synchronization