Engineering Materials Questions

• In low carbon steels, presence of small quantities of sulphur improves
• Phosphorus is added in low carbon steels to raise its yield point.
• The defect which takes place due to imperfect packing of atoms during crystallisation is known as
• The material in which the atoms are arranged chaotically, is called
• Free cutting steels
• Which of the following metal shrinks most from molten state to solid state?
• The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called
• The addition of which of the following improves machining of copper?
• When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
• The alloy, mainly used for corrosion resistance in stainless steels is
• According to Indian standard specifications, SG 400/15 means
• Age hardening is related to
• When a medium carbon steel is heated to coarsening temperature,
• Cast iron is used in those parts which are subjected to shocks.
• Delta-iron occurs between the temperature range of
• A steel containing 16 to 18% chromium and about 0.12% carbon is called
• Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
• A coarse grained steel
• In a unit cell of close packed hexagonal space lattice, there are twenty four atoms.
• The main alloying elements high speed steel in order of increasing proportion are