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Control Systems

Control Systems
Which of the following is/are the example of actuator?

 Pneumatic motor
 Hydraulic motor
 All
 Electric motor

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Control Systems
Type and order of transfer function G (s) = K / {s(s + 2)}

 2, 1.
 1, 2.
 1, 1.
 0, 2.

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Control Systems
A linear time invariant system has an impulse response e2t for t > 0 . If initial condition are 0 and input is e3t, the output for t > 0 is

  e5t.
  e2t + e3t.
  e2t - e3t.
  e3t - e2t.

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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

 1.2 sec.
 0.4 sec.
 2 sec.
 1.6 sec.

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Control Systems
Certain control system has input u(t) and output c(t). If the input is first passed through a block having transfer function e-s and unit gain is applied to the applied to the system. The modified output will be

 c(t)u(t)
 c(t).u(t-1)
 c(t-1).u(t)
 c(t-1).u(t-1)

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its open loop transfer function is

 (2s+2)/s²
 (2s+1)/(s+1)²
 (2s+2)/(s+1)²
 (2s+1)/s²

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