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Process Control and Instrumentation

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

Natural gas
Solids
Alkali metals
Isotopes

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Process Control and Instrumentation
The initial value (t=0) of the unit step response of the transfer function [(s + 1)/(2s + 1)] is

1
2
43832

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

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Neither A nor B
Both A & B Here
Gage as well as vacuum
Absolute as well as differential

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Process Control and Instrumentation
In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.

Manipulated
None of these
Controlled
Load

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Process Control and Instrumentation
When a bare thermocouple is covered by a protective sheath, the response becomes

Slower and oscillatory
Faster and oscillatory
Slower and non-oscillatory
Faster and non-oscillatory

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