Q. Which of the following type sound generators are not possible?

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Q. Mosaic regarding sonar is ____________

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Q. All elements of sonar are driven electrically.

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Q. Piezo electric materials are well cut for _____________

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Q. Which of the following can be used in sonar?

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Q. Magnetostriction transmitter uses _______________

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Q. OTDR stands for _______________

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Q. Which of the following is not correct for fibre optic sensors?

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Q. Fluoride glass is used with __________

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Q. Silica glass of hydroxyl concentration can be used for ___________ of wavelength.

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Q. General spectral range for silica glass is _______________

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Q. Epoxy material in fibre optics is intended for ________________

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Q. Plastics optical cables can be used for ________________

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Q. Which of the following represents loss associated with glass fibres?

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Q. Loss associated with plastic fibre is less than glass fibres.

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Q. Cladding in glass fibre have high refractive index than the core.

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Q. Which of the following change electrical conductivity on the absorption of a gas molecule?

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Q. Polypropylene is a/an _____________

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Q. ISE stands for __________________

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Q. Glass electrode is an ion selective electrode.

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