Nitrogen meters are calibrated for which of the following to measure nitrogen?(a) Mixture of nitrogen and air(b) Water saturated mixture of nitrogen and oxygen(c) Mixture of nitrogen and hydrogen(d) NitrogenThe question was posed to me during a job interview.The origin of the question is Method Based on Ionization of Gases in chapter Industrial Gas Analysers of Analytical Instrumentation

Nitrogen meters are calibrated for which of the following to measure n

1.	Nitrogen meters are calibrated for which of the following to measure nitrogen?(a) Mixture of nitrogen and air(b) Water saturated mixture of nitrogen and oxygen(c) Mixture of nitrogen and hydrogen(d) NitrogenThe question was posed to me during a job interview.The origin of the question is Method Based on Ionization of Gases in chapter Industrial Gas Analysers of Analytical Instrumentation
Answer» CORRECT choice is (B) Water saturated mixture of nitrogen and oxygen Easiest explanation: Nitrogen METERS are calibrated for water saturated mixture of nitrogen and oxygen. Hence, this calibration cannot be used for DRY GASES.

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