CONTROLS SYSTEMS MCQ

1.       Which of the following is not a definition of Control systems?

• a.       A control system is a system that is used to control the behaviour of a device or process

• b. It is made up of three main components: a sensor, a controller, and an actuator.

• c.       a set of mechanical or electronic devices that regulates other devices or systems by way of control loops

• d.       is a network of electrical components deployed to supply, transfer, and use electric power.

1.       What is the characteristic of a good control system?

• a.        Insensitive to the parameter variation but sensitive to the input commands

•  b. Neither sensitive to parameter variations nor sensitive to input commands

•  c. Insensitive to the input command

• d. Sensitive to parameter variation

Which of the following is not the feature of a modern control system?

• a. Correct power level

• b) No oscillation

• c) Quick response

• Accuracy

 Which of the following element is not used in an automatic control system?

•  Final control element

•  Sensor

•  Oscillator

•  Error detector

A control system working under unknown random actions is called ____________

• Adaptive control system

•  Stochastic control system

• Computer control system

•  Digital data system

Which of the following is an open loop control system?

•  Ward Leonard control

• Metadyne

•  Stroboscope

•  Field controlled D.C. motor

 Which of the following statements is correct for any closed loop system?

• Only one of the static error co-efficient has a finite non-zero value

•  All the co-efficient can have zero value

•  All the co-efficient are always non-zero

•  All of the mentioned

The output of the feedback control system must be a function of ____________

• Output and feedback signal

• Input and feedback signal

• Reference input

• Reference output

Which of the following statement is true about Feedback control system?

•  a. Equally sensitive to forward feedback path parameter changes

• b. Insensitive to both forward and feedback path parameter changes

• c. Less sensitive to feedback path parameter changes than to forward path parameter changes

• d. Less sensitive to forward path parameter changes than to feedback path parameter changes

Consider the following statements with respect to the feedback of the control systems.

i. Feedback can improve stability or be harmful to stability if it is not properly applied.

ii. Feedback can always improve stability

iii. In many situations the feedback can reduce the effect of noise and disturbance on system performance.

iv. In general the sensitivity of the system gain of a feedback system of a parameter variation depends on where the parameter is located.

• i, ii, iii and iv only

•  i, ii and iii only

• iii and iv only

• i, ii and iv only