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Process Control and Instrumentation

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

Overdamped
Highly fluctuating
Underdamped
Critically damped

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Process Control and Instrumentation
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

N₂
CO
CO₂
O₂

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Process Control and Instrumentation
A manometer measures the __________ pressure.

Gauge
Atmospheric
Absolute
None of these

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Process Control and Instrumentation
Out of the following themocouple wire insulating material, the highest temperature rating is for

Asbestos
Ceramic fibre
Teflon
Fibre glass

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Process Control and Instrumentation
Thermocouple in a thermal well behaves as a true

Second order system (underdamped)
Second order system (overdamped)
Multiple first order system
First order system

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Process Control and Instrumentation
For an input forcing function, X(t) = 2t², the Laplace transform of this function is

4/s²
4/s³
2/s²
2/s³

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