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Process Control and Instrumentation

Process Control and Instrumentation
Flame photometry is used for the determination of compositional analysis of

Alkali metals
Solids
Natural gas
Isotopes

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Process Control and Instrumentation
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an

Optical pyrometer
Chromel-alumel thermocouple
Either B or C
Radiation pyrometer

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Volumetric expansion
None of these
Pressure rise with temperature
Linear expansion

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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
87.5
100

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Process Control and Instrumentation
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

- 39 and 350
- 79 and 395
- 51 and 439
- 10 and 425

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Process Control and Instrumentation
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

Triangular
Semi-log
Log-lag
Ordinary

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