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Process Control and Instrumentation

Process Control and Instrumentation
Stalagmometer is used for the measurement of

Optical activity
Surface tension
Kinematic viscosity
Refractive index

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

Critically damped
Unstable
Stable
None of these

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Process Control and Instrumentation
Which of the following is not a differential pressure flow meter?

Orificemeter
Flow nozzle
Rotameter
Venturimeter

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Process Control and Instrumentation
Thermal wells used in temperature measurements should have

Very thick walls
Low emissivity
Polished surface
High transmissivity of radiation

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Process Control and Instrumentation
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

1
100
50
10

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

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

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