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Process Control and Instrumentation

Process Control and Instrumentation
0n-off control which is a special case of proportional control, has a band width of about __________ percent.

100
75
25

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Process Control and Instrumentation
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

None of these
Pirani
Ionisation
Mcloid

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Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

Zero
2nd
3rd
1st

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Process Control and Instrumentation
Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference?

None of these
Thomson effect
Peltier effect
Seebeck effect

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Process Control and Instrumentation
Which of the following controllers has the least maximum deviation?

P-controller
P-I-D controller
P-I controller
P-D controller

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Process Control and Instrumentation
The thermal emf-temperature relationship of most thermocouples is

Square root
Parabolic
Linear
Exponential

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