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Process Control and Instrumentation

Process Control and Instrumentation
Gain margin is equal to the

Gain in P-I controller
Reciprocal of amplitude ratio
Gain in P controller
Amplitude ratio

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Process Control and Instrumentation
Which is the most suitable instrument for measuring pressure below 3 microns?

Mcleoid gauge
Bourdon guage
Alphatron
Ionisation gauge

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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
1
43832

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Process Control and Instrumentation
Bode diagram are generated from output response of the system subjected to which of the following input?

Step
Ramp
Sinusoidal
Impulse

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Process Control and Instrumentation
Which of the following can measure temperatures in the range of - 20 to 300°C ?

Mercury in glass thermometer
Resistance thermometer
None of these
Vapor pressure thermometer

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Process Control and Instrumentation
Presence of a small amount of water in the organic systems can be determined by the __________ method.

Dielectric constant end loss factor
Polarimetry
Emission spectroscopy
Electrical conductivity

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