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Control Systems

Control Systems
The type number of the control system with G(s) = k(s+2)/(s(s²+2s+3) is

 1
 0
 3
 2

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Control Systems
At which frequency does the Bode magnitude plots for the functions K/S2 have gain crossover frequency

 ω = K2 rad/sec.
 ω = 0 rad/sec.
 ω = √K rad/sec.
 ω = K rad/sec.

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

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

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

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

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Control Systems
A transfer function has a zero at s = -1 and poles at s = -1 ± j1. The multiplier being unity, if the input is step function, the steady state response is given by

 0.5∠10°
 2∠90°
 1∠0°
 0.5∠0°

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Control Systems
The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

 1.6 sec.
 0.4 sec.
 1.2 sec.
 2 sec.

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