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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following thermocouples can measure the maximum temperature?

Chromel-alumel
Platinum-rhodium
Iron-constantan
Tungsten-molybdenum

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

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

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Process Control and Instrumentation
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

None of these
Mcloid
Pirani
Ionisation

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Process Control and Instrumentation
The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly

Non-linear
Parabolic
Linear
Hyperbolic

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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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Process Control and Instrumentation
In second order underdamped system,

Overshoot increases for increasing damping co-efficient
Decay ratio = (overshoot)²
Decay ratio = overshoot
Large damping co-efficient means smaller damping

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