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Process Control and Instrumentation

Process Control and Instrumentation
The unit of 'time constant' of a system is the same as that of

None of these
(time)⁻¹
Time
Velocity

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Water
Air
Oil
Steam

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Process Control and Instrumentation
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

Triangular
Ordinary
Log-lag
Semi-log

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Process Control and Instrumentation
Zirconia probe is used for the measurement of

Humidity of air
% O₂ in flue gas
Speed of a submarine
% CO₂ in flue gas

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is

None of these
Iron-constantan
Platinum-platinum+rhodium
Chromel-alumel

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Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Highly fluctuating
Critically damped
Overdamped
Underdamped

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