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Process Control and Instrumentation

Process Control and Instrumentation
Specific gravity of a liquid can not be measured by a/an

Hydrometer
Pycnometer
Anemometer
Specific gravity bottle

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

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

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Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Introducing derivative control
None of these
Introducing integral control
Reducing value of Kc

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Process Control and Instrumentation
Out of the following themocouple wire insulating material, the highest temperature rating is for

Fibre glass
Asbestos
Ceramic fibre
Teflon

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

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

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

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

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