The fluid used in hydraulic controller is

More Questions from Process Control and Instrumentation

• Feed forward controller accounts for the __________ changes.
• Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.
• The __________ of a vapor pressure thermometer is a primary element.
• "A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency." This is __________ criterion.
• Measurement of pressure in ammonia reactor is done by
• A process is initially at steady state with its output y=l for an input u=l. The input is suddenly changed to 2 at time t=0. The output response is y(t)=1+2t. The transfer function of the process is
• What is the dynamic error in a critically damped second order instrument for a ramp input (At)?
• Which of the following is a 'contact' pyrometer?
• On-off controllers are normally used for
• Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

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