1. A control system with excessive noise, is likely to suffer from

saturation in amplifying stages

loss of gain

vibrations

oscillations

2. is an open loop control system

Ward Leonard control

Field controlled D.C. motor

Stroboscope

Metadyne

3. .The output of a feedback control system must be a function of

reference and output

reference and input

input and feedback signal

output and feedback signal

4. Which of the following should be done to make an unstable system stable ?

The gain of the system should be decreased

The gain of the system should be increased

The number of poles to the loop transfer function should be increased

The number of zeros to the loop transfer function should be increased

5. Which of the following devices are commonly used as error detectors in instruments ?

Vernistats

Microsyns

Resolvers

Any of the above

6. The capacitance, in force-current analogy, is analogous to

momentum

velocity

displacement

mass

7. A controller, essentially, is a

sensor

clipper

comparator

amplifier

8. In a control system the output of the controller is given to

final control element

amplifier

comparator

sensor

9. In an automatic control system which of the following elements is not used ?

Error detector

Final control element

Sensor

Oscillator

10. In a stable control system backlash can cause which of the following ?

Underdamping

Overdamping

Poor stability at reduced values of open loop gain

Low-level oscillations