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Process Control and Instrumentation

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

Exponential
Linear
Parabolic
Square root

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Process Control and Instrumentation
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a

High thermal conductivity
Small specific heat
Large area but small mass
All of these

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Process Control and Instrumentation
Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an

Magnetic flow meter
Hot wire anemometer
Orificemeter
Venturimeter

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Process Control and Instrumentation
Stability of a control system containing a transportation lag can be best analysed by

None of these
Root locus methods
Routh test
Frequency response methods

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

100
25
75

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Process Control and Instrumentation
Reset rate is the another term used for __________ time.

Integral
Dead
Derivative
None of these

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