Q. Which of the following is not a use of magnesium-manganese ferrites?

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Q. Yttrium-iron-garnet is used as microwave isolators in the ____ range.

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Q. What is the coercive force of high carbon steel?

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Q. What is the value of residual induction of alnico alloys?

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Q. Which of the following is a requirement for thermal insulation in materials?

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Q. How does moisture affect the thermal insulation of a body?

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Q. Which of the following is an example of organic insulating material?

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Q. An insulating material named 85% magnesia can be used up to temperatures of _______

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Q. An insulating material made from ______ is preferred for applications where vibration resistance is vital.

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Q. A cork insulation with a waterproof binder is used for _______ surfaces.

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Q. Which of the following is a cause for an increase in insulation?

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Q. An electrically insulating material has a resistivity that is ____ times greater than that of copper.

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Q. The resistance of an insulating material ______ as the temperature increases.

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Q. Ionic conductivity of a material can be increased by _______

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Q. Cork has a low thermal conductivity of _____ W/m K.

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Q. The measure of loss of energy in a material is defined as _____

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Q. Which of the following is both a good electrical insulator and thermal conductor?

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Q. The insulating materials resist degradation by stability against chemical reaction over ________

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Q. Cellular concrete is used for ______ insulation.

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Q. Which insulating material does a combination of magnesium oxychloride and gelatin produce?

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