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Process Control and Instrumentation

Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and > 30°
> 1.7 and < 30°
> 1.7 and > 30°
< 1.7 and < 30°

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Process Control and Instrumentation
Turbine flow meters are suitable for

Aerospace and in air borne applications
Both B and C
Cryogenic flow measurements
Very limited flow ranges

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Process Control and Instrumentation
Which of the following does not figure in the list of seven substances selected for international temperature scale?

Oxygen and sulphur (B.P)
Zinc (B.P) and mercury (F.P)
Antimony and silver (F.P)
Ice (F.P) and steam (B.P)

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Process Control and Instrumentation
The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.

Volume
All of these
Viscosity
Pressure

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Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

1
∞
-1

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Differential linear expansion
Increase of pressure
Increase of thermal conductivity
Volumetric expansion

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