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Process Control and Instrumentation

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

1
43832
2

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Process Control and Instrumentation
Gas chromatography is used for the measurement of

Pressure
Temperature
Concentration
Flow rate

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Process Control and Instrumentation
Thermal conductivity measurement is used for the determination of

Specific gravity of petrofuels
CO₂ percentage in the flue gas
O₂ percentage in the flue gas
Composition of an alloy

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Process Control and Instrumentation
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

961.93
1261.93
1064.43
630.74

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Process Control and Instrumentation
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the

Alcohol filled thermometer
Iron-constantan thermocouple
Optical pyrometer
Mercury in glass thermometer

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

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

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