Which of the following is not a cause of the error that could occur in Hartman and Braun oxygen analyzer based on the magnetic wind?(a) The filament temperature could be affected by changes in thermal conductivity of the carrier gas(b) Hydrocarbons in sample stream may react on the heated filaments(c) Gravitation chimney flow effect lead to errors when cross tube is horizontal(d) Combustible gases may react on the heated filamentsI got this question in an online interview.Question is from Magnetic Wind Instruments topic in portion Industrial Gas Analysers of Analytical Instrumentation

Which of the following is not a cause of the error that could occur in

1.	Which of the following is not a cause of the error that could occur in Hartman and Braun oxygen analyzer based on the magnetic wind?(a) The filament temperature could be affected by changes in thermal conductivity of the carrier gas(b) Hydrocarbons in sample stream may react on the heated filaments(c) Gravitation chimney flow effect lead to errors when cross tube is horizontal(d) Combustible gases may react on the heated filamentsI got this question in an online interview.Question is from Magnetic Wind Instruments topic in portion Industrial Gas Analysers of Analytical Instrumentation
Answer» CORRECT answer is (c) Gravitation CHIMNEY flow effect LEAD to errors when cross TUBE is horizontal Explanation: Error occurs when a cross tube is vertical. When the cross tube is horizontal, errors DUE to gravitation chimney flow effect is avoided.

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