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Sample rates of nitrogen meter can be adjusted by doing which of the following?

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Sample rates of nitrogen meter can be adjusted by doing which of the following?

(a) By modifying the amplifier

(b) With the help of the needle valve

(c) By modifying the detector

(d) By changing chopper frequency

The question was posed to me by my college professor while I was bunking the class.

This interesting question is from Method Based on Ionization of Gases in section Industrial Gas Analysers of Analytical Instrumentation

1 Answer

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Best answer
Right choice is (b) With the help of the needle valve

Explanation: Sample rates of nitrogen meter can be adjusted with the help of a needle valve. Modern nitrogen analyzers have digital displays.

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