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Process Control and Instrumentation

Process Control and Instrumentation
The term analogous to the electrical current in a thermal system is the

Heat content in the system
Heat flow rate
None of these
Temperature difference

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Process Control and Instrumentation
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-38.9
-11.9
-80.9
-60.9

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Process Control and Instrumentation
Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C?

Thermocouples
Radiation pyrometer
Optical pyrometer
Photoelectric pyrometer

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Process Control and Instrumentation
Polarograph is meant for the analysis of

Gaseous mixture
Isotopes
Solids
Miscible liquids

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Process Control and Instrumentation
A non-linear chemical system is exemplified by a/an

Non-isothermal CSTR
Mixer
None of these
Isothermal CSTR

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Nichrome
Vycor (a glass)
Inconel
Steel

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