Q. Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?

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Q. __________ does not contain tin as an alloying material.

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Q. A metallic alloy in general as compared to their pure metal components is

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Q. Pick out the wrong statement.

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Q. Ball bearings are normally made of __________ steel.

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Q. The electrical conductivity of a __________ decreases with rise in temperature.

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Q. Which one occupies the lowermost position in the electromotive series of metals ?

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Q. Addition of nickel to copper improves its

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Q. Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.

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Q. Ceramic materials fabrication can not be done by

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Q. Which has the maximum melting point out of the following ?

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Q. Cast iron is

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Q. Which of the following has no effect on the carbide forming tendency in steels ?

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Q. Approximate value of the modulus of elasticity for steel is about __________ x 10⁶ kg/cm².

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Q. High speed cutting tool steels contain about __________ percent of tungsten.

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Q. The 'bomb' in the bomb calorimeter is made of

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Q. Which of the following is produced by condensation polymerisation ?

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Q. The crystal structure of most of the common metals is

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Q. Telfon (PTFE) is corroded by

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Q. Hastelloy C is a good material of construction in chemical process industry, since it is

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