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Process Control and Instrumentation

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

CSTR
None of these
Tubular reactor
On-off controller

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Process Control and Instrumentation
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

Low electrical conductivity
Low flash point
High viscosity index
Low thermal conductivity

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Process Control and Instrumentation
In a single tank system, the transfer function of level to inlet flow rate is

L(TS + l)
1/TS
R/(TS + 1)
R/TS

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Process Control and Instrumentation
An amplitude ratio of 0.1 corresponds to __________ decibels.

-20
10
-10
20

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Process Control and Instrumentation
Which of the following thermocouples can measure the maximum temperature?

Tungsten-molybdenum
Platinum-rhodium
Iron-constantan
Chromel-alumel

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Process Control and Instrumentation
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

Ordinary
Triangular
Semi-log
Log-lag

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