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Process Control and Instrumentation

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

44020
-1
43838
1

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Process Control and Instrumentation
Which of the following is not a second order instrument?

None of these
Mercury in glass thermometer with covering
Pressure gauge with one bellow, two tubes and a tank
Bare mercury in glass thermometer

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Process Control and Instrumentation
Turbine flow meters are suitable for

Both B and C
Very limited flow ranges
Aerospace and in air borne applications
Cryogenic flow measurements

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Process Control and Instrumentation
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?

>1
< 1
None of these
1

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

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

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Process Control and Instrumentation
Nichol's chart deals with

R. vs. phase lag of second order
Closed loop values vs. open loop values
R. vs. phase lag of first order
Frequency response values of controllers

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