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Process Control and Instrumentation

Process Control and Instrumentation
In an exothermic chemical reactor, the manipulated variable is the flow rate of

None of these
Coolant
Product
Reactants

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Process Control and Instrumentation
Dome temperature of blast furnace stove is most accurately measured by a

Platinum-platinum/rhodium ther-mocuple
Platinum resistance thermometer
Radiation pyrometer
Iron-constantan thermocouple

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Process Control and Instrumentation
Thermistors are made of

Ultra pure metals
Iron-copper alloys
Nickel-chromium alloys
Metal oxides

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Process Control and Instrumentation
A barometer measures the __________ pressure.

Gauge
Absolute
Dynamic
Absolute as well as gauge

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Process Control and Instrumentation
Bode diagram is a plot of

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

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Process Control and Instrumentation
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .

< 3 (gage)
< 10 (gage)
> 2(gage)
< atmospheric

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