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Process Control and Instrumentation

Process Control and Instrumentation
Temperature measuring instruments are standardised mostly with __________ points of pure substances.

Both A & B Here
Neither A nor B Here
Melting
Boiling

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Process Control and Instrumentation
Which of the systems having following transfer functions is stable?

1/(s²-2s + 3)
Exp(-20s)/(s² + 2s-l)
1/(s²+ 2)
1/(s² + 2s + 2)

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Oil
Water
Air
Steam

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Process Control and Instrumentation
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

-90°
-180°
-45°
45°

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Process Control and Instrumentation
__________ are analysed using a polarograph.

Isotonic solutions
Solids
Liquids
Gases

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Process Control and Instrumentation
An aneroid barometer measures the __________ pressure.

Absolute
Atmospheric
Gage
Vacuum

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