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Process Control and Instrumentation

Process Control and Instrumentation
Flame photometry is used for the determination of compositional analysis of

Alkali metals
Isotopes
Natural gas
Solids

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Process Control and Instrumentation
Liquid flow rate in an open channel can not be measured by a/an

Rectangular weir
V-notch
Orifice meter
Cipolletti weir

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Process Control and Instrumentation
Stroboscope is used for the measurement of

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

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Process Control and Instrumentation
Transfer function of transportation lag is

None of these
1/(TS + 1)
ETS
E-TS

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

Overdamped
Highly fluctuating
Critically damped
Underdamped

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Process Control and Instrumentation
Phase lag of the frequency response of a second order system to a sinusoidal forcing function

Approaches 180° asymptotically
Is 120°
Is 90° at the most
Is 30°

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