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Process Control and Instrumentation

Process Control and Instrumentation
Bourdon tube is never made of

Stainless steel
Phosphor bronze
Monel metal
Cast iron

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

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

1/(τds + 1)
Τds + 1
E-τds
Eτds

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Process Control and Instrumentation
Continuous measurement of moisture in paper is done by

Weighing
Sling psychrometer
High resistance Wheatstone's bridge circuit
Hair-hygrometer

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

Critically damped
Unstable
None of these
Stable

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Process Control and Instrumentation
A non-linear chemical system is exemplified by a/an

Isothermal CSTR
Non-isothermal CSTR
Mixer
None of these

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