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Process Control and Instrumentation

Process Control and Instrumentation
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is

68
12
54
36

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Process Control and Instrumentation
Which of the following is not a second order instrument?

Mercury in glass thermometer with covering
Bare mercury in glass thermometer
Pressure gauge with one bellow, two tubes and a tank
None of these

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Process Control and Instrumentation
Composition of alloys can be determined by

Chromatograph
Polarograph
None of these
Refractrometer

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is

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

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Process Control and Instrumentation
Bode stability method uses __________ loop transfer function.

Open
Closed
Neither A nor B Here
Either A Or B Here

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Process Control and Instrumentation
pH meter has

One cell
No cell
Two cells
Three cells

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