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Process Control and Instrumentation

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

Closed
Open
Either A Or B Here
Neither A nor B Here

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Process Control and Instrumentation
Compositional analysis of __________ is done using mass spectrometer.

Natural gas
An alloy
A solid
An isotope

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Process Control and Instrumentation
Flow rate through an orifice is __________ the pressure differential.

Inversely proportional to the square of
Inversely proportional to the square root of
Proportional to the square root of
Proportional to

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Process Control and Instrumentation
What is the dynamic error in a critically damped second order instrument for a ramp input (AT)?

1.5 AT
0.5 AT
2 AT
√AT

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Process Control and Instrumentation
Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.

95
63.2
100
87.5

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is

Chromel-alumel
None of these
Iron-constantan
Platinum-platinum+rhodium

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