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Control Systems - Interview Questions and Answers

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71. The transfer function technique is considered as inadequate under which of the following conditions ? (a) Systems having complexities and non-linearities
A. Systems having stability problems
B. Systems having multiple input dis�turbances
C. All of the above
D. All of the above
Explanation:
72. A.C. servomotor is basically a
A. universal motor
B. single phase induction motor
C. two phase induction motor
D. three phase induction motor
Explanation:
73. In pneumatic control systems the control valve used as final control element converts
A. pressure signal to electric signal
B. pressure signal to position change
C. electric signal to pressure signal
D. position change to pressure signal
Explanation:
74. A differentiator is usually not a part of a control system because it
A. reduces damping
B. reduces the gain margin
C. increases input noise
D. increases error
Explanation:
75. Which of the following can be measured byLVDT?
A. Displacement
B. Velocity
C. Acceleration
D. Any of the above
Explanation:
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