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Process Control and Instrumentation

Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and < 30°
> 1.7 and < 30°
> 1.7 and > 30°
< 1.7 and > 30°

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Process Control and Instrumentation
The term analogous to the electrical current in a thermal system is the

Heat content in the system
Heat flow rate
Temperature difference
None of these

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Process Control and Instrumentation
Compositional analysis of __________ is done using mass spectrometer.

A solid
An isotope
An alloy
Natural gas

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Process Control and Instrumentation
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)

nRT/P
nRT/V
p/nRT
V/nRT

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Process Control and Instrumentation
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'

Rankine
Farenhite
Reumur
Celcius

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Process Control and Instrumentation
Measurement of pressure in ammonia reactor is done by

Pirani guage
Inclined tube manometer
Bourdon gauge
U-tube manometer

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