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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following thermocouples can measure the maximum temperature?

Iron-constantan
Chromel-alumel
Tungsten-molybdenum
Platinum-rhodium

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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

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

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Process Control and Instrumentation
Which of the systems having following transfer functions is stable?

Exp(-20s)/(s² + 2s-l)
1/(s² + 2s + 2)
1/(s²+ 2)
1/(s²-2s + 3)

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Process Control and Instrumentation
Hot wire anemometer is used for the measurement of

Thermal conductivity of gases
Very high temperature
Flow rates of fluids
Flow rates of granular solids

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Process Control and Instrumentation
Bourdon tube is never made of

Monel metal
Stainless steel
Cast iron
Phosphor bronze

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Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

Zero
3rd
2nd
1st

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