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Process Control and Instrumentation

Process Control and Instrumentation
Composition of natural gas is determined by the

Haldane apparatus
Mass spectrometer
Both B and C
Chromatograph

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Process Control and Instrumentation
If response of a control system is to be free of offset and oscillation, the most suitable controller is

Proportional integral-derivative (PID) controller
Proportional controller
Proportional-integral (PI) controller
Proportional-derivative(PD)controller

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Process Control and Instrumentation
Bourdon gauges are used for measuring pressure (kg/cm² )

> 10 (absolute)
> 2 (gauge)
< atmospheric
< 2 (gauge)

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Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of a __________ is 1.

None of these
First order system
Transportation lag
Second order system

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Process Control and Instrumentation
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.

No change
Increase
Exponential decrease
Decrease

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Process Control and Instrumentation
Specific gravity of a liquid can not be measured by a/an

Hydrometer
Anemometer
Pycnometer
Specific gravity bottle

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