Q. The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

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Q. Pick out the wrong statement.

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Q. __________ of austenite decreases the hardenability in steel.

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Q. A jig is used while __________ a hole.

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Q. Which of the following is not a cupro-nick-el alloy ?

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Q. Electrochemical corrosion occurs

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Q. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

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Q. Improvement in mechanical properties of metals in its hot working is due to the grains

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Q. Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby

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Q. Batch process is preferred over continuous process, when the

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Q. Which of the following is a permanent fastening?

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Q. Hot & cold working of material causes its __________ deformation.

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Q. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)

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Q. In a fuel cell, chemical energy is converted into

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Q. Shock resisting steels should possess high

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Q. Fatigue life is expected to increase by

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Q. Specific __________ is a dimensionless quantity.

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Q. __________ is not used as the control rod material in a nuclear reactor.

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Q. Superheated vapour behaves like

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Q. Which of the following is not an ore of iron ?

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