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Process Control and Instrumentation

Process Control and Instrumentation
A pyrheliometer is an instrument used for measuring the

None of these
Bright sunshine period
Beam radiation
Diffuse radiation

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Process Control and Instrumentation
Out of the following themocouple wire insulating material, the highest temperature rating is for

Fibre glass
Asbestos
Teflon
Ceramic fibre

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Increase of thermal conductivity
Volumetric expansion
Differential linear expansion
Increase of pressure

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Process Control and Instrumentation
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

Kc is reduced
Kc is increased
Derivative control action is introduced
Integral control action is introduced

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Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

None of these
Thomson
Peltier
Seebeck

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

Thermocouple kept immersed in a liquid filled thermowell
U-tube manometer
CSTR with first order reaction
Spring loaded diaphragm valve

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