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Process Control and Instrumentation

Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

50
40
20
30

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Process Control and Instrumentation
__________ type of element is normally not used in the bimetallic thermometers.

Single helix
Bourdon tube
Multiple helix
Flat spiral

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a primary element.

None of these
Pointer
Bourdon tube
Bulb

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

Unstable
Critically damped
None of these
Stable

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Process Control and Instrumentation
Pick out the first order system from among the following.

Mercury in glass thermometer kept in boiling water
Non-interacting system of two tanks in series
Interacting system of two tanks in series
Damped vibrator

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Microvolts
Kilo volts
Volts
Millivolts

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