Q. The block diagram of series mode analyser of NO and NO₂ is given below. Identify the unmarked procedure.

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Q. The light output from the discharge tube is interrupted by means of a rotating slotted disc.

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Q. The voltage required for striking the discharge in the presence of nitrogen is 1500V.

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Q. In which of the following ways can nitrogen be calibrated for dry gases?

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Q. Why is nitrogen meters generally not calibrated for dry gases while measuring nitrogen?

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Q. Nitrogen meters are calibrated for which of the following to measure nitrogen?

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Q. Which of the following is the normal sampling rate used in nitrogen meters?

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Q. Sample rates of nitrogen meter can be adjusted by doing which of the following?

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Q. The characteristic emission of which colour, when discharge takes place in a low pressure chamber containing gas sample, will indicate the presence of nitrogen while using photospectrometer?

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Q. Which of the following measuring technique is utilized for measuring nitrogen?

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Q. Gases emit radiation under which of the following conditions which can be used for determination of gases?

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Q. Which of the following is the effective sample volume in analyzers based on gas density?

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Q. When hot-wires are used as detectors amplification is not required.

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Q. In analyzers based on gas density, if the sample carries a gas having a higher density than the detector which of the following occurs?

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Q. Which of the following bridges are used in analyzers based on gas density?

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Q. In analyzers based on gas density, the unbalance of the bridge is linearly proportional to which of the following?

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Q. The use of thermistor eliminates the requirement for amplification.

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Q. When would the recorder indicate a zero base line in analyzers based on gas density?

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Q. Which of the following detectors are not used in analyzers based on gas density?

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Q. Under which of the following conditions do all real gases behave as ideal gases to some extent?

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