Engineering Materials Questions

• When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of
• Beryllium bronze contains
• 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.
• The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening
• Sulphur in cast iron
• In the lower part of the blast furnace (zone of fusion), the temperature is
• There are fourteen atoms in a unit cell of
• Macro-structure of a material is, generally, examined by
• Eutectoid reaction occurs at
• Ball bearings are, usually, made from
• The silicon steel is widely used for
• The percentage carbon content in wrought iron is about
• When filing or machining cast iron makes our hands black, then it shows that __________ is present in cast iron.
• Nickel when added to copper improves
• The alloying element which reduces the formation of iron sulphide in steel is
• Babbit metal is a
• The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
• In a hardening process, the hypo-eutectoid steel is
• When a low carbon steel is heated upto lower critical temperature,
• The maximum internal diameter of a blast furnace is about