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Process Control and Instrumentation

Process Control and Instrumentation
What is the dynamic error in a critically damped second order instrument for a ramp input (AT)?

1.5 AT
0.5 AT
√AT
2 AT

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Process Control and Instrumentation
Mass spectrometer is used for the composition analysis of

Solids
Isotopes
None of these
Alloys

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Process Control and Instrumentation
The response of two tanks of same size and resistance in series is

Critically damped
Over damped
None of these
Under damped

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Process Control and Instrumentation
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is

68
12
54
36

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change?

Carbon-tetrachloride
Water
Mercury
Methyl alcohal

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Process Control and Instrumentation
Feed forward controller accounts for the __________ changes.

Load
Set point
Both A & B
Neither A nor B

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