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Control Systems

Control Systems
Settling time for 5% tolerance band is -------------

 2T.
 3T.
 4T.
 5T.

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Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

 S is on root locus
None of these
 S is not on root locus
 either 1 or 2

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Control Systems
The Laplace transform of a transportation lag of 5 seconds is

 1/(s+5).
 e-5s.
 e5s.
 1/(s-5).

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Control Systems
Which of the following is/are the disadvantages of an open loop control system?

 Inaccurate.
None of these
 both 1 and 2.
 Unreliable.

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Control Systems
The value of 'a' in to give phase margin = 45o will be

 1.414.
 0.9.
 1.18.
 0.707.

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

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

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