Q. Hardening of steel is not possible, unless it is heated __________ critical point.

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Q. Isotropic materials have the same __________ in all directions.

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Q. The most important requirement for aluminium industry is the availability of cheap

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Q. Spheriodising of a material is a/an __________ process.

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Q. Iron content in Indian iron ore is about __________ percent.

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Q. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

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Q. __________ of hard alloy and tool steel is done to make it easily machinable.

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Q. Which of the following mainly decides the current to be employed is arc welding ?

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Q. Temperature attained in soldering of metals is about __________ °C.

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Q. Dielectric

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Q. Normalising of an object does not

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Q. Plasma is

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Q. The machanism involved in the removal of metal in drilling operation is by

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Q. Thermal conductivity of a material does not depend upon its

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Q. Potable water means the water used for

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Q. One ton of refrigeration is not equivalent to the heat removal rate of

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Q. Starting friction is low in case of the __________ lubrication.

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Q. Ultimate strength in tension as compared to that in shear for steel is

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Q. Which of the following heat treatment processes is usually applied to castings ?

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Q. The main constituent of bones is

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