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Process Control and Instrumentation

Process Control and Instrumentation
The level of a liquid under pressure can be determined using

Diaphragm box system
Differential pressure manometer
Bubbler system
Air-trap system

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Process Control and Instrumentation
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

Kc is reduced
Kc is increased
Derivative control action is introduced
Integral control action is introduced

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Process Control and Instrumentation
Which of the following is never used as an element of industrial resistance thermometer?

30% iron + 70% nickel
Copper
Lead
Nickel

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Process Control and Instrumentation
Which of the following is not a differential pressure flow meter?

Flow nozzle
Orificemeter
Venturimeter
Rotameter

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Process Control and Instrumentation
Dead zone in an instrument must be less than __________ percent of the scale.

1.5
0.2
8
4

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

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

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