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Process Control and Instrumentation

Process Control and Instrumentation
Process degree of freedom indicates __________ number of controllers to be used.

Both maximum and the minimum
The minimum
The maximum
Nothing about the

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Thermocouple
Vapor pressure thermometer
Reistance thermometer
Mercury in glass thermometer

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Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

1
44020
-1
43838

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Process Control and Instrumentation
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.

Exponential decrease
Increase
No change
Decrease

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Process Control and Instrumentation
Working principle of radiation pyrometer is based on the

Stafan-Boltzman law
Wien's law
Kirchoffs law
Seebeck effect

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Process Control and Instrumentation
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?

Vapor pressure thermometer
Mercury in glass thermometer
Radiation pyrometer
Platinum resistance thermometer

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