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Process Control and Instrumentation

Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a primary element.

Bulb
None of these
Bourdon tube
Pointer

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Process Control and Instrumentation
0n-off control which is a special case of proportional control, has a band width of about __________ percent.

100
25
75

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Process Control and Instrumentation
Which of the following is not the triple point of water?

32°F
492°R
32°R
273°K

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Kilo volts
Millivolts
Microvolts
Volts

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

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

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

All of these
Chromel-constantan
Iron-constantan
Platinum-platinum + rhodium

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