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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Level
Both A & B Here
Neither A nor B Here
Outlet flow rate

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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?

Mercury
Water
Carbon-tetrachloride
Methyl alcohal

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Air
Steam
Water
Oil

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Process Control and Instrumentation
In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.

Load
None of these
Controlled
Manipulated

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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
-1
43838
44020

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Process Control and Instrumentation
__________ stability method uses open loop transfer function.

None of these
Nyquist
Ruth
Mikhalov

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