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Process Instrumentation and Control - Interview Questions and Answers

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1. Which of the following does not pertain to timing device :
A. charging of a condenser
B. flow of oil through a dash pot
C. release of air through a nozzle
D. flow of sand through an opening
E. piezoelectric crystal.
Explanation:
2. Which of the following device is used as a standard for calibrating pressure gauges :
A. manometer
B. diaphragm
C. bellows
D. dead weight pressure tester
E. piezoelectric crystal.
Explanation:
3. The overshoot and the settling time are maximum with :
A. underdamped system
B. overdamped system
C. critically damped system
D. damped system
E. non damped system.
Explanation:
4. A controller action in which there is a predetermined relation between the values of the controlled variable and the rate of motion of a final control element:
A. floating controller action
B. proportional-position controller action
C. proportional-speed floating control�ler action
D. two-position controller action
E. self-regulation controller action.
Explanation:
5. The transient performance characteristics of the control are conveniently obtained from curve of the :
A. open-loop frequency response func-tion
B. transfer functions of system
C. closed loop frequency response
D. all of above
E. none of above.
Explanation:
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