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Process Control and Instrumentation

Process Control and Instrumentation
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

Difference
Product
Ratio
Sum

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Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C?

Iron-constantan
Copper - constantan
Chromel - alumel
Platinum - platinum + rhodium

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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

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

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Process Control and Instrumentation
Pick out the first order system from among the following.

Mercury in glass thermometer kept in boiling water
Interacting system of two tanks in series
Damped vibrator
Non-interacting system of two tanks in series

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Pressure rise with temperature
None of these
Linear expansion
Volumetric expansion

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Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

∞
-1
1

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