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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

Velocity
Time
None of these
(time)⁻¹

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Volumetric expansion
Linear expansion
None of these
Pressure rise with temperature

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Process Control and Instrumentation
Conversion formula for converting amplitude ratio (AR) into decibels is

Decibel = 20 loge (AR)0.5
Decibel = 20 log10 (AR)
Decibel = 20 log10 (AR)0.5
Decibel = 20 loge (AR)

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Process Control and Instrumentation
Flow rate through an orifice is __________ the pressure differential.

Inversely proportional to the square of
Proportional to the square root of
Inversely proportional to the square root of
Proportional to

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Process Control and Instrumentation
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

None of these
Mcloid
Ionisation
Pirani

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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.

Emission spectroscopy
Dielectric constant end loss factor
Electrical conductivity
Polarimetry

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