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Process Control and Instrumentation

Process Control and Instrumentation
__________ thermometer can not measure sub-zero (< 0° C) temperature,

Resistance
Bimetallic
Vapor pressure
Mercury in glass

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Process Control and Instrumentation
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer

Increases exponentially
Decreases
Increases
Remains constant

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Process Control and Instrumentation
Transfer function of transportation lag is

1/(TS + 1)
ETS
None of these
E-TS

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

1st
3rd
2nd
Zero

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Process Control and Instrumentation
Mercury thermometer can be used to measure the temperature upto __________ °C.

250
350
100
750

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Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Introducing derivative control
None of these
Reducing value of Kc
Introducing integral control

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