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Process Control and Instrumentation

Process Control and Instrumentation
The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.

Volume
All of these
Pressure
Viscosity

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Process Control and Instrumentation
Temperature of __________ can not be measured by an optical or radiation pyrometer.

Rotary limestone calcination kiln
Combustion space in boilers
Hot blast (air) from stoves
Molten slag flowing out of blast furnace

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Process Control and Instrumentation
Which of the following is not a speed measuring instrument?

All of these
Psychrometer
Tachometer
Stroboscope

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Process Control and Instrumentation
Pirani gauge is used for the measurement of

Liquid level under pressure
Very high pressure
Liquid level at atmospheric pressure
High vacuum

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Process Control and Instrumentation
The transfer function of a first order system is

1/Ts
S/(Ts + 1)
1/(Ts + 1)
None of these

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Process Control and Instrumentation
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?

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

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