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

Q. Killed steels

View solution

Q. The slow cooling of steel from the __________ results in a coarse grained structure.

View solution

Q. Which one of the following sets of constituents is expected in equilibrium cooling of a hyper-eutectoid steel from austenitic state?

View solution

Q. The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics.

View solution

Q. Muntz metal (Yellow brass) contains

View solution

Q. Which of the following gives the correct order of increasing hot hardness of cutting tool materials?

View solution

Q. The slag from the blast furnace

View solution

Q. Which of the following is a mesomorphous material?

View solution

Q. In the middle part of the blast furnace (zone of absorption), the temperature is

View solution

Q. The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part.

View solution

Q. The temperature point at which the change starts on heating the steel is called

View solution

Q. Aluminium bronze has high resistance to corrosion.

View solution

Q. Manganese bronze contains more copper than silicon bronze.

View solution

Q. In a face centred cubic space lattice, there are

View solution

Q. The fuel used in a blast furnace is

View solution