Q. Macro-structure of a material is, generally, examined by

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Q. Aluminium has low density and addition of silicon improves its fluidity and therefore, its castability.

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Q. Which of the following property is desirable for materials used in tools and machines?

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Q. Babbit metal is a

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Q. The metal suitable for bearings subjected to heavy loads, is

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Q. The compressive strength of cast iron is __________ that of its tensile strength.

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Q. When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of

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Q. Eutectoid reaction occurs at

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Q. The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening

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Q. Nickel when added to copper improves

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Q. When filing or machining cast iron makes our hands black, then it shows that __________ is present in cast iron.

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Q. According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is

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Q. Wrought iron

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Q. In iron, the presence of carbon in free form is called graphite.

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Q. In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre.

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Q. The bond formed by transferring electrons from one atom to another is called

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Q. German silver contains

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Q. Connecting rod is, usually, made from

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Q. Which of the following inpurity in cast iron makes it hard and brittle?

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Q. When a low carbon steel is heated upto lower critical temperature,

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