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Process Control and Instrumentation

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

> 800
< 0
> 0
< 100

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Process Control and Instrumentation
To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with

A metal powder or graphite
Mercury
Oil
Air

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Process Control and Instrumentation
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a

All of these
High thermal conductivity
Large area but small mass
Small specific heat

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Reistance thermometer
Vapor pressure thermometer
Mercury in glass thermometer
Thermocouple

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Process Control and Instrumentation
On-off controllers are normally used for

Temperature changes
Flow rate changes
Low loads
None of these

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Process Control and Instrumentation
Bode stability method uses __________ loop transfer function.

Open
Neither A nor B Here
Either A Or B Here
Closed

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