Q. Why is invar used in bimetallic strips?

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Q. _______ is commonly used in liquid-expansion thermometers.

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Q. Resistance thermometer generally makes use of ________ for the measurement of resistance.

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Q. Which of these materials is not used for resistance coils?

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Q. Liquid expansion thermometers are filled with ________

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Q. What is the most widely used method for metallurgical temperature measurement?

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Q. The total emf of the thermoelectric pyrometer is given as ___________

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Q. The cold junction in a thermoelectric pyrometer is maintained at ________

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Q. Chromel-Alumel can be used at a temperature range of __________

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Q. Constantan is an alloy containing _________

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Q. What is the advantage of copper-constantan over iron-constantan?

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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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