Q. Which material is used when radiation pyrometers don’t produce a satisfactory result?

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Q. __________are used as protecting tubes in thermocouples above 2000 F.

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Q. Which type of pyrometer uses an electric circuit?

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Q. A radiation pyrometer is based on ___________

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Q. What does Stefan-Boltzmann law for radiation pyrometers denote?

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Q. What is the maximum usable temperature of radiation pyrometers?

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Q. What can be done to increase the temperature range of optical pyrometers?

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Q. What can be done to make the color comparison better for an optical pyrometer?

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Q. Removal of hard sample material is done by _________

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Q. What can be done to make the specimen easy to handle?

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Q. Which thermosetting resin is used in the mounting of the specimen in metallography?

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Q. How much pressure is applied for molding of Bakelite during mounting?

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Q. Which thermoplastic resin is used for mounting a specimen in metallography?

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Q. What is the effect of removing the mount while it is still hot?

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Q. Which material is used for intermediate polishing of soft materials?

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Q. Which of the following is not used for fine polishing of the mount?

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Q. Which polishing cloth is mostly used for polishing of materials?

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Q. What is the final stage of intermediate polishing using emery paper?

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