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Automatic Control Systems

Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Either (a) or (b)
Rotor
Stator
Partly on stator and partly on rotor

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Automatic Control Systems
The sensor generally used in incremental optical encoder is

Photodiode
LCD
Either (a) or (b)
LED

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Automatic Control Systems
The distance of poles from origin depends on

Uqndamped natural frequency
Neither A nor B
Both A and B
Damping ratio

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Automatic Control Systems
Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator

3 and 4
1 and 2
All
1, 2 and 3

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Automatic Control Systems
M circles are symmetrical with respect to

M = 1 straight line and imaginary axis
M = 1 straight line and real axis
M = 1 straight line
Real and imaginary axis

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Automatic Control Systems
Which of the following is open loop system?

Respiratory system of animal
Aqualing
Wind screen wiper
System for controlling antirocket missiles

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MORE MCQ ON Automatic Control Systems

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