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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.

Sum
Product
Difference
Ratio

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Process Control and Instrumentation
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is

G/(1 + H)
G/H
H/G
H(1 + G)

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Process Control and Instrumentation
Which of the following thermocouples has the least temperature measurement range?

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

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Process Control and Instrumentation
__________ is an example of distributed parameter system

On-off controller
None of these
CSTR
Tubular reactor

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Process Control and Instrumentation
Radiation thermometer can not measure the temperature

Of liquid oxygen
Inside a pressure vessel
Of moving objects at high temperature
Of an object without coming in contact with it

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Process Control and Instrumentation
Dome temperature of blast furnace stove is most accurately measured by a

Iron-constantan thermocouple
Radiation pyrometer
Platinum-platinum/rhodium ther-mocuple
Platinum resistance thermometer

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