The quenching of steel from the upper critical point results in a fine grained structure.
Nodular cast iron is produced by adding __________ to the molten cast iron.
Normalising of steel is done to
Age hardening is related to
The addition of which of the following improves machining of copper?
According to Indian standard specifications, SG 400/means
The acidic bessemer process is suitable for producing steel from pig iron containing large quantities of phosphorus.
The charge of the blast furnace consists of
Brass is an alloy of
Silicon when added to copper improves
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
The hardness of steel increases if it contains
An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and
Cast iron is a
The coke in the charge of blast furnace
A steel containingtochromium and 0.to 0.carbon is called martensitic stainless steel.
When a steel containing __________ 0.carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
Dye penetrant method is generally used to locate
When a medium carbon steel is heated to coarsening temperature,
White cast iron has
In low carbon steels, presence of small quantities of sulphur improves
The ability of a material to resist fracture due to high impact loads, is called
A material is said to be allotropic, if it has
Cast iron is manufactured in
In full annealing, the hypo-eutectoid steel is heated fromC toC above the upper critical temperature and then cooled
Which of the following has a fine gold colour and is used for imitation jewellery?
Haematite iron ore contains iron about
The aluminium alloy, mainly used, for anodized utensil manufacture, is
The property of a material essential for spring materials is
The material widely used for making pendulums of clocks is
The cupola is used to manufacture
The type of space lattice found in gamma-iron is
Which of the following display properties similar to that of steel?
The hardness is the property of a material due to which it
Nimonic contains __________ percentage of nickel as that of Inconel.
The charge is fed into the blast furnace through the
Phosphorus is added in low carbon steels to raise its yield point.
Iron-carbon alloys containing carbon __________ 4.are known as hyper-eutectic cast irons.
Cast iron is used in those parts which are subjected to shocks.
The purpose of heat treatment is to
Closed packed hexagonal space lattice is found in
The lower critical point for all steels is
Ferrite and pearlite makes the steel soft and ductile.
When the steel is normalised, its
The material in which the atoms are arranged regularly in some directions but not in others, is called
The toughness of a material __________ when it is heated.
A steel with carbon above 0.is known as hyper-eutectoid steel.
The stiffness is the ability of a material to resist
The property of a material due to which it breaks with little permanent distortion, is called
Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.