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Automatic Control Systems

Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Synchro
Thermistor
Strain gauge
Load cell

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Automatic Control Systems
Transport lag usually exists in

Thermal systems
Hydraulic systems and thermal systems
Thermal, hydraulic and pneumatic systems
Pneumatic systems

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Automatic Control Systems
Nichols chart consists of

Constant phase angle loci
None of these
Magnitude and phase angle loci in log-magnitude versus phase diagram
Constant magnitude loci

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Automatic Control Systems
In control systems the output of sensor usually, is

Mechanical signal
Digital electrical signal
Analog or digital electrical signal
Analog electrical signal

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Automatic Control Systems
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

None of these
The gain is decreased below lower critical value
Both A and B
The gain is increased beyond upper critical value

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Automatic Control Systems
M circles are symmetrical with respect to

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

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