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Process Control and Instrumentation

Process Control and Instrumentation
Routh stability method uses __________ loop transfer function.

Open
Neither A nor B
Closed
Either A or B

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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
None of these
< 1
1

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Process Control and Instrumentation
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of

1.0
4.0
0.5
2.0

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Process Control and Instrumentation
Non-metallic diaphragm used as pressure sensor in instruments is generally made of

Bakelite
Teflon
Synthetic rubber
Thick paper

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Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Platinum-platinum+rhodium
Either A, B or C
Chromel-alumel
Iron-constantan

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Process Control and Instrumentation
Psychrometer determines the

Water of crystallisation
Moisture content of solids
Humidity of gases
Hygroscopic nature of solids

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