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Process Control and Instrumentation

Process Control and Instrumentation
Flame photometry is used for the determination of compositional analysis of

Natural gas
Isotopes
Alkali metals
Solids

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Temperature compensating
Temperature measuring
Both B & C
Voltage measuring

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 3
> 3
< 0.1
< 1

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Process Control and Instrumentation
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)

p/nRT
nRT/P
V/nRT
nRT/V

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

Bourdon tube
Pointer
None of these
Bulb

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Process Control and Instrumentation
A stable system is the one

None of these
For which the output response is bounded for all bounded input
Which exhibits an unbounded response to a bounded input
Which satisfies the conditions for a servo problem

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