If the oxygen content is not greater than 21%, which of the following gases must be used to set the span point?(a) Oxygen(b) Dry air(c) Nitrogen(d) HydrogenThis question was posed to me by my school teacher while I was bunking the class.My doubt is from Paramagnetic Oxygen Analyser topic in section Industrial Gas Analysers of Analytical Instrumentation

If the oxygen content is not greater than 21%, which of the following

1.	If the oxygen content is not greater than 21%, which of the following gases must be used to set the span point?(a) Oxygen(b) Dry air(c) Nitrogen(d) HydrogenThis question was posed to me by my school teacher while I was bunking the class.My doubt is from Paramagnetic Oxygen Analyser topic in section Industrial Gas Analysers of Analytical Instrumentation
Answer» The correct ANSWER is (b) Dry air Explanation: If the oxygen content is not greater than 21%, dry air is USED to set the SPAN point. This is done for calibration purposes.

Discussion

No Comment Found

Related InterviewSolutions

Which of the following is used as detector in improved infrared analyzer used for gas analysis?(a) PbSe(b) MgCl2(c) ZnCl(d) CuCl2The question was posed to me during an online exam.This intriguing question originated from Infrared Gas Analysers in chapter Industrial Gas Analysers of Analytical Instrumentation
In analyzers based on gas density, if the sample carries a gas having a higher density than the detector which of the following occurs?(a) It will cause a net downward flow(b) It will cause a net upward flow(c) It splits into two beams(d) There will be no difference in flowI got this question in a national level competition.Question is taken from Analysers Based on Gas Density in division Industrial Gas Analysers of Analytical Instrumentation
In Paramagnetic oxygen analyzer, when no oxygen is present the magnetic force balances torque of the fibre.(a) True(b) FalseThe question was posed to me during an interview.My question is based upon Paramagnetic Oxygen Analyser topic in division Industrial Gas Analysers of Analytical Instrumentation
Magnetic wind analyzers are also known as which of the following?(a) Thermo-magnetic analyzers(b) Electro-magnetic analyzers(c) Thermo-analytical analyzers(d) Hot wire analyzersThis question was addressed to me in an interview for job.This interesting question is from Magnetic Wind Instruments in chapter Industrial Gas Analysers of Analytical Instrumentation
Which of the following occurs in Electrochemical cells used for the detection of hydrogen sulphide?(a) Change in resistance(b) Redox reaction(c) Oxidation-reduction reaction(d) Change in colourI have been asked this question during an interview.Query is from H2S Analysers topic in portion Industrial Gas Analysers of Analytical Instrumentation
How is NO converted to NO2 for analysis in UV and Visible analyzers?(a) Treating sample gas with pressurized oxygen(b) Treating sample gas with ozone(c) Treating sample gas with oxygen at low pressure(d) Treating sample gas with water at high pressureI got this question in an international level competition.Question is from NO2 Analyser topic in chapter Industrial Gas Analysers of Analytical Instrumentation
In which of the following ways can nitrogen be calibrated for dry gases?(a) By modifying the amplifier(b) By adjusting the needle valve(c) By modifying the detector(d) By changing chopper frequencyI have been asked this question during an interview.This key question is from Method Based on Ionization of Gases topic in division Industrial Gas Analysers of Analytical Instrumentation
In the Beckman instrument, the flow rate recommended when the sample enters directly for rapid response is which of the following?(a) 100-200 cc/min(b) 50-250 cc/min(c) 40-60 cc/min(d) 200-300 cc/minI got this question at a job interview.My enquiry is from Paramagnetic Oxygen Analyser topic in section Industrial Gas Analysers of Analytical Instrumentation
Hydrocarbons need to be removed from the sample gas to avoid errors in Hartman and Braun oxygen analyzer.(a) True(b) FalseI had been asked this question during a job interview.My question is from Magnetic Wind Instruments in chapter Industrial Gas Analysers of Analytical Instrumentation
Which of the following bridges are used in thermal conductivity analyzers?(a) Wheatstone bridge(b) Kelvin’s bridge(c) Anderson’s bridge(d) Schering’s bridgeI got this question by my college professor while I was bunking the class.This interesting question is from Thermal Conductivity Analysers topic in chapter Industrial Gas Analysers of Analytical Instrumentation

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment