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Control Systems

Control Systems
A control system has open loop transfer function G(s) = k/(s(s + 2). Find the break away point?

 -2
 2
 1
 -1

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Control Systems
The characteristic equation of a control system is given by What are the angles of asymptotes of the root loci for k ≥ 0?

 0°, 120°, 240°
 60°, 180°, 300°
 0°, 180°, 300°
 120°, 180°, 240°

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Control Systems
The device necessarily used for automatic temperature control in a furnace is

 Thermocouple.
 Auto-transformer.
 Thermostat.
 Any of above.

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Control Systems
When writing a transfer function which of the following loops are not valid loops?

 Both 1 and 2.
 Self loops at input node.
 Self loops at output node.
 Neither 1 nor 2.

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Control Systems
For a unity feedback control system open loop transfer function then position error constant is

 infinity.
 20.
 40.
 0.

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Control Systems
Time constant is defined as the time taken by the response of the system to reach ----------- ?

 100% of the final value
 63% of the final value
 50% of the final value
 70.7% of the final value

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