Controller Components – I MCQ’s

Control Systems Electronics & Communication Engineering

This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Controller Components – I”.

1. The chief advantage offered by the electronics is:
a) Differencing and stable amplification by Op-Amp
b) Stable amplification of power level by use of power transistor and SCR’s
c) Differencing and stable amplification of power level by Op-Amp
d) No amplification with the Op-Amp

2. Which of the motions in actuators are preferred:
a) Translator
b) Rotary
c) Stationary
d) Non-Stationary

3. Low power transducers called sensors prefer:
a) Linear relationship between controlled variable and output variable
b) Non-functional relationship between controlled variable and output variable
c) Non-linear relationship between controlled variable and output variable
d) Not related with each other

4. Assertion (A): Electric actuators are used control system for high torque applications.
Reason (R): Due to linear speed-Torque characteristics.
a) Both A and R are true and R is correct explanation of A
b) Both A and R are 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

5. The torque developed by the motor when stationary with the full applied voltage__________
a) Stalled torque
b) Torque
c) Force
d) Couple

6. Electric actuators for stepped motion are known as stepper motor.
a) True
b) False

7. Low power DC and AC motors are also known as _________
a) Servomotors
b) Tachogenerators
c) A.C. generators
d) D.C. generators

8. High torque/inertia ratio means:
a) Stalled torque
b) Stalled inertia
c) Stalled toque/inertia ratio
d) Lower motor time constant

9. DC motors can be modeled as:
a) Armature controlled
b) Field Controlled
c) Both a and b
d) None of the mentioned

10. DC motors are constructed using:
a) Permanent Magnet
b) Electromagnet.
c) Magnets are not used
d) Plastics

11. Assertion (A): Pneumatic actuators are not as messy as hydraulic ones.
Reason (R): Pneumatic suffer from leakages and inherent inaccuracies.
a) Both A and R are true and R is correct explanation of A
b) Both A and R are 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

12. Permanent magnets used for DC motors because of:
a) High residual flux density
b) High coercivity
c) Both a and b
d) Retentivity

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