Q. Hardness of steel is increased by adding sulphur, lead and phosphorus.

View solution

Q. German silver contains

View solution

Q. The machine tool guide ways are usually hardened by

View solution

Q. In a unit cell of a body centred cubic space lattice, there are __________ atoms.

View solution

Q. Cast iron has

View solution

Q. The nuts and bolts are made from silicon steel.

View solution

Q. Silicon in cast iron

View solution

Q. The process which improves the machinability of steels, but lowers the hardness and tensile strength, is

View solution

Q. A steel with 0.8% carbon and 100% pearlite is called

View solution

Q. 18/8 stainless steel consists of

View solution

Q. Vanadium when added to steel

View solution

Q. The limestone in the charge of a blast furnace decomposes to give lime and carbon dioxide. The lime thus obtained

View solution

Q. During the operation of a bessemer converter, the white flame indicates that the silicon and managenese had burnt and carbon has started oxidising.

View solution

Q. The casting ability of aluminium increases when __________ is added to aluminium.

View solution

Q. Manganese bronze has

View solution

Q. A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as

View solution

Q. Silicon bronze contains

View solution

Q. In acidic bessemer process, the furnace is lined with

View solution

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

View solution

Q. The addition of magnesium to cast iron increases its

View solution