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Process Control and Instrumentation

Process Control and Instrumentation
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.

> 100
0-100
< 0
> 50

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Process Control and Instrumentation
Bode diagram is a plot of

AR vs. log (f) and Φ vs. log (f)
Log (AR) vs. log (f) and (Φ) vs. log (f)
None of these
Log (AR) vs. f and log Φ vs.f

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a secondary element.

None ofthese
Pointer
Bourdon tube
Bulb

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Process Control and Instrumentation
On-off controllers are normally used for

Low loads
None of these
Temperature changes
Flow rate changes

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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
250
550
350

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

Second order system
Transportation lag
None of these
First order system

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