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Automatic Control Systems

Automatic Control Systems
DC tachogenerator can be used in

Both A and B
Speed control system
Neither A nor B
Position control system

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Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

False
True

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

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

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Automatic Control Systems
Which control action can never be used alone?

Integral
Proportional
Both (b) and (c)
Derivative

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

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

Neither (a) nor (b)
Both (a) and (b)
The life of controller
The level of accuracy

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