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Process Control and Instrumentation

Process Control and Instrumentation
Silver point temperature is __________ °C.

860.5
960.5
760.5
1060.5

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Process Control and Instrumentation
Change of angle of refraction with composition comprises the working principle of a

Polarograph
Spectrometer
Refractrometer
Polarimeter

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Process Control and Instrumentation
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

Routh stability
None of these
Bode stability
Nyquist

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Process Control and Instrumentation
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

Radiation pyrometer
Mercury thermometer
Bimetallic thermometer
Thermocouple

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Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

800-1600
400-1600
400-1000
800-2500

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

Reistance thermometer
Mercury in glass thermometer
Thermocouple
Vapor pressure thermometer

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