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Process Control and Instrumentation

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

Zero
2nd
1st
3rd

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Process Control and Instrumentation
Which of the following is never used as an element of industrial resistance thermometer?

Lead
30% iron + 70% nickel
Copper
Nickel

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Process Control and Instrumentation
Composition of alloys can be determined by

None of these
Refractrometer
Polarograph
Chromatograph

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Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

0° & 80°
32° & 80°
32° & 460°
- 273° & 80°

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Process Control and Instrumentation
The transfer function of a process is 1/(16s² + 8s + 4). If a step change is introduced into the system, then the response will be

None of these
Over damped
Under damped
Critically damped

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Process Control and Instrumentation
Which of the following is not a second order instrument?

Bare mercury in glass thermometer
Mercury in glass thermometer with covering
Pressure gauge with one bellow, two tubes and a tank
None of these

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