Control Systems

When the output of a system is used to influence input it is known as...

• Feedback
• Processing
• Automation
• Measuring

If poles of system are lying on the imaginary axis in s-plane, the system will be

• Unstable

• Marginally stable

• Conditionally stable

• Unstable

A control system is also known as a...

• Closed Loop System
• Open Loop System
• Open Sensor System
• Closed Sensor System

When the output of a system is used to influence input it is known as...

• Feedback
• Processing
• Automation
• Measuring

With feedback _______ increases

• system stability

• sensitivity

• gain

• effects of disturbing signals

In open loop system____

• the control action depends on the size of the system

• the control action depends on system variables

• the control action depends on the input signal

• the control action is independent of the output

Which system is also known as automatic control system?

• open loop control system

• Closed loop control system

• both 1 & 2

• None of these

Reference input minus the primary feedback is called ________ signal

• Manipulated variable

• Error signal

• Zero signal

• Primary feedback

The roots of the denominator polynomial of the transfer function are called:

• ZEROS

• POLES

• SINGULARS

• PLURALS

Transfer function is the ratio of

• Laplace transform of output to input

• Laplace transform of output to Laplace transform of input.

• Laplace transform of output to Laplace transform of input assuming all initial condition zero.

• Output to Laplace transform of input.