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Process Control and Instrumentation

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

Low emissivity
Polished surface
Very thick walls
High transmissivity of radiation

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

Transportation lag
None of these
First order system
Second order system

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Process Control and Instrumentation
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.

< 0
> 800
< 100
> 0

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

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

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Process Control and Instrumentation
Bode diagram are generated from output response of the system subjected to which of the following input?

Impulse
Step
Ramp
Sinusoidal

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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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