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Process Control and Instrumentation

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

None of these
Low loads
Temperature changes
Flow rate changes

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Process Control and Instrumentation
Which of the following thermometers is not suitable for distant reading upto 60 metres?

Resistance thermometer
Vapor pressure thermometer
Mercury in glass thermometer
Constant volume gas thermometer

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Process Control and Instrumentation
Which of the following can measure temperatures in the range of - 20 to 300°C ?

None of these
Mercury in glass thermometer
Vapor pressure thermometer
Resistance thermometer

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Process Control and Instrumentation
Platinum resistance thermometer is the international standard for temperature measurement between

Triple point of hydrogen and freezing point of antimony
Both A and B
Neither A nor B
13.81°K to 903.9°K

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Process Control and Instrumentation
A non-linear system will have __________ steady state values.

One
More than one
Three
Two

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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
10
50
100

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