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Process Control and Instrumentation

Process Control and Instrumentation
Use of I-control along with P-control facilitates

Reduction of stability time
Reduction of offset
None of these
Elimination of offset

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Process Control and Instrumentation
An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall. This is the working principle of a

Polarimeter
Polarograph
PH meter
Chromatograph

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Both B & C
Voltage measuring
Temperature measuring
Temperature compensating

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Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of a __________ is 1.

None of these
First order system
Transportation lag
Second order system

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Neither A nor B
Both A & B Here
Absolute as well as differential
Gage as well as vacuum

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Process Control and Instrumentation
The transfer function for a P-D controller is

Kc(1+τD s)
Kc/τD s
Kc(1 +1/τD s)
Kc τD s

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