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Process Control and Instrumentation

Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 1
< 3
> 3
< 0.1

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Process Control and Instrumentation
When a bare thermocouple is covered by a protective sheath, the response becomes

Slower and oscillatory
Faster and oscillatory
Faster and non-oscillatory
Slower and non-oscillatory

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Process Control and Instrumentation
Stroboscope is used for the measurement of

Frequency of light
Liquid level under pressure
Depression of freezing point
Rpm of a flywheel

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Process Control and Instrumentation
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).

W = √(7/6), Kc = 46/3
W = 1/√14, Kc = 45/7√14
W = 1, Kc = 13
W = √(7/8), Kc = 45/4

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Process Control and Instrumentation
In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.

Ordinary
Semi-log
Log-log
Triangular

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Volumetric expansion
Differential linear expansion
Increase of pressure
Increase of thermal conductivity

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