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Process Control and Instrumentation

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

0.5
1.0
4.0
2.0

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Process Control and Instrumentation
Which is the strongest paramagnetic gas?

CO₂
O₂
NO₂
NO

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

Thermocouple kept immersed in a liquid filled thermowell
CSTR with first order reaction
U-tube manometer
Spring loaded diaphragm valve

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Process Control and Instrumentation
The term analogous to the electrical current in a thermal system is the

Heat flow rate
None of these
Heat content in the system
Temperature difference

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is

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

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Process Control and Instrumentation
Which of the following can measure temperatures in the range of - 20 to 300°C ?

Vapor pressure thermometer
None of these
Resistance thermometer
Mercury in glass thermometer

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