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Process Control and Instrumentation

Process Control and Instrumentation
The response of two tanks of same size and resistance in series is

Critically damped
Under damped
Over damped
None of these

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Process Control and Instrumentation
Radiation thermometer can not measure the temperature

Of moving objects at high temperature
Of liquid oxygen
Inside a pressure vessel
Of an object without coming in contact with it

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Process Control and Instrumentation
Identify an unbounded input from inputs whose transfer functions are given below

1/(S² + 1)
1/S²
1/S
1

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Temperature compensating
Both B & C
Voltage measuring
Temperature measuring

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Process Control and Instrumentation
A bolometer is

An element which senses optical input and delivers thermal output
Both A & B Here
Used for the measurement of thermal radiation
Neither A nor B Here

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Process Control and Instrumentation
According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is

180°
0°
90°
45°

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