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Process Control and Instrumentation

Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of a __________ is 1.

None of these
Second order system
First order system
Transportation lag

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

1.0
0.5
2.0
4.0

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Process Control and Instrumentation
Reset rate is the another term used for __________ time.

Dead
Integral
Derivative
None of these

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Process Control and Instrumentation
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

700
550
250
350

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Process Control and Instrumentation
Hot wire anemometer is used for the measurement of

Flow rates of granular solids
Flow rates of fluids
Very high temperature
Thermal conductivity of gases

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Process Control and Instrumentation
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

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

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