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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of level to inlet flow rate is

R/TS
L(TS + l)
1/TS
R/(TS + 1)

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Process Control and Instrumentation
The initial value (t=0) of the unit step response of the transfer function [(s + 1)/(2s + 1)] is

2
43832
1

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Process Control and Instrumentation
Bode diagram is a plot of

None of these
AR vs. log (f) and Φ vs. log (f)
Log (AR) vs. f and log Φ vs.f
Log (AR) vs. log (f) and (Φ) vs. log (f)

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

None of these
Mikhalov
Nyquist
Ruth

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Process Control and Instrumentation
Change of angle of refraction with composition comprises the working principle of a

Polarograph
Polarimeter
Refractrometer
Spectrometer

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Process Control and Instrumentation
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in

Light intensity
Current
Flux density
Voltage

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