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Process Control and Instrumentation

Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Highly fluctuating
Underdamped
Critically damped
Overdamped

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Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C?

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

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Process Control and Instrumentation
__________ controller has the maximum stabilising time.

PI
PD
P
PID

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Process Control and Instrumentation
What is the Laplace transform of sin t ?

S/(s² + 1)
S/(s² - 1)
1/(s² + 1)
1/(s² - 1)

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Process Control and Instrumentation
Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.

0.1
0.001
0.0001
0.01

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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

Hyperbolic
Parabolic
Non-linear
Linear

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