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Process Control and Instrumentation

Process Control and Instrumentation
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is

1 + et
1 - e-t
1 + e-t
1 - et

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Process Control and Instrumentation
Flow rate of a river is measured by a/an

Pitot tube
Open weir
Vane meter
Kennison nozzle

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

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

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Process Control and Instrumentation
Which of the following is not a second order instrument?

Bare mercury in glass thermometer
Mercury in glass thermometer with covering
None of these
Pressure gauge with one bellow, two tubes and a tank

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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?

Water
Carbon-tetrachloride
Methyl alcohal
Mercury

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Process Control and Instrumentation
Platinum resistance thermometer is the international standard for temperature measurement between

Neither A nor B
13.81°K to 903.9°K
Triple point of hydrogen and freezing point of antimony
Both A and B

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