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Process Control and Instrumentation

Process Control and Instrumentation
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

10
1
50
100

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Process Control and Instrumentation
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of

2.0
4.0
0.5
1.0

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Process Control and Instrumentation
Mcleoid gauge is used to measure the

Vacuum
Point velocity
Flow rate
Pressure

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Process Control and Instrumentation
Bode diagram is a plot of

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

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Process Control and Instrumentation
The open loop transfer function of a control system is KR/(1 + TS) . This represents

A second order system
A first order system
A first order time lag
Dead time system

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Process Control and Instrumentation
Psychrometer determines the

Water of crystallisation
Moisture content of solids
Humidity of gases
Hygroscopic nature of solids

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