Q. Which of the following is used as a source in the simple infrared analyzer for gas analysis?

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Q. Vibration excitation occurs only if the sample has hetero-atomic molecules.

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Q. Which of the following is the chopping frequency used for medical applications in simple infrared analyser for gas analysis?

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Q. The movement of diaphragm in simple infrared analyser for gas analysis results in which of the following?

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Q. Which of the following is not the drawback of conventional infrared analyzers used for gas analysis?

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Q. Which of the following is used as detector in improved infrared analyzer used for gas analysis?

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Q. In calibration of CO₂ analyser, in order to establish zero calibration which of the following is used as sample?

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Q. Which of the following is not the characteristics of Indium arsenide photovoltaic detector used in infrared analyzers for hydrocarbons?

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Q. Luft detector cell which uses gas as detection mechanism is not vibration sensitive.

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Q. Which kind of filter is used in improved version of infrared gas analyzer at the output end?

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Q. Thermal conductivity analyzers cannot be used in which of the following measurements?

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Q. In which of the following conditions can thermal conductivity analyzer be used for multi-component mixtures?

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Q. Which among the following elements has the highest thermal conductivity?

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Q. Which of the following materials are generally not used for the construction of filaments in thermal conductivity analyzers?

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Q. Thermistors have positive temperature-coefficient of resistance.

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Q. Which of the following is not the characteristic of thermistors used in thermal conductivity analyzers?

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Q. How can the high speed of response be obtained in thermal conductivity analyzers?

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Q. Which of the following bridges are used in thermal conductivity analyzers?

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Q. Which of the following is generally used as indicators in bridges in thermal conductivity analyzers?

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Q. Changes in the composition of gas stream give rise to changes in thermal conductivity of the gas stream.

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