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Process Control and Instrumentation

Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

1
44020
-1
43838

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Process Control and Instrumentation
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

D²
D
D³
D⁴

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Process Control and Instrumentation
What is the Laplace transform of impulse input having magnitude 'X' ?

X²
X
1/X
1

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Process Control and Instrumentation
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an

Conductor
Liquid semi-conductor
Solid semi-conductor
Insulator

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Process Control and Instrumentation
Which of the following measurements can be made by the measurement of emf?

All of these
Degree of hydrolysis
Composition of complex ions
PH value

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

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

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