Answer: Option D. -> Wheatstone Bridge becomes balanced due to temperature change Answer: (d).Wheatstone Bridge becomes balanced due to temperature change
Question 55. 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?
The filament temperature could be affected by changes in thermal conductivity of the carrier gas
Hydrocarbons in sample stream may react on the heated filaments
Gravitation chimney flow effect lead to errors when cross tube is horizontal
Combustible gases may react on the heated filaments
Answer: Option C. -> Gravitation chimney flow effect lead to errors when cross tube is horizontal Answer: (c).Gravitation chimney flow effect lead to errors when cross tube is horizontal
Question 56. Hydrocarbons need to be removed from the sample gas to avoid errors in Hartman and Braun oxygen analyzer.