Effect of Adding a Zero to a System – II MCQ’s

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This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Effect of Adding a Zero to a System – II”.

1. _____________ is not a final control element.
a) Control valve
b) Potentiometer
c) Electro-pneumatic converter
d) Servomotor

2. Which of the following is the definition of proportional band of a controller?
a) The range of air output as measured variable varies from maximum to minimum
b) The range of measured variables from set value
c) The range of measured variables through which the air output changes from maximum to minimum
d) All of the mentioned

3. Which of the following can be measured by the use of a tacho-generator?
a) Acceleration
b) Speed
c) Speed and acceleration
d) Displacement

4. In pneumatic control systems the control valve used as final control element converts
a) Pressure signal to electric signal
b) Pressure signal to position change
c) Electric signal to pressure signal
d) Position change to pressure signal

5. Assertion (A): Feedback compensation is preferred to series compensation.
Reason (R): No amplification is required as the energy flows from higher to lower levels.
a) Both assertion and reason are true and R is correct explanation of A
b) Both A and R true but R is not correct explanation of A
c) A is true but R is false
d) A is False but R is true

6. Assertion (A): A derivative controller produces a control action for constant error only.
Reason (R): The PD controller increases the damping and reduces the peak overshoot.
a) Both assertion and reason are true and R is correct explanation of A
b) Both A and R true but R is not correct explanation of A
c) A is true but R is false
d) A is False but R is true

7. Pressure error can be measured by which of the following?
a) Differential bellows and strain gauge
b) Selsyn
c) Strain gauge
d) Strain gauge and potentiometer

8. Assertion (A): A PI controller increases the order of the system by units but decreases the steady state error.
Reason (R): A PI controller introduces a pole at either the origin or at a desired points on the negative real axis.
a) Both assertion and reason are true and R is correct explanation of A
b) Both A and R true but R is not correct explanation of A
c) A is true but R is false
d) A is False but R is true

9. A plant is controlled by a proportional controller, if time delay element is introduced in the loop its:
a) Phase margin remains the same
b) Phase margin increases
c) Phase margin decreases
d) Gain margin increases

10. Assertion (A): Lead compensation is used to improve the system’s stability
Reason (R): Lead compensation achieves the desired result through the merits of its phase lead contribution.
a) Both assertion and reason are true and R is correct explanation of A
b) Both A and R true but R is not correct explanation of A
c) A is true but R is false
d) A is False but R is true

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