According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is
0.04 %
0.35 to 0.45 %
0.4 to 0.6 %
0.6 to 0.8 %
Correct Answer :
B. 0.35 to 0.45 %
Related Questions
By severely deforming a metal in a particular direction it becomes
Ductile
Malleable
Homogeneous
Anisotropic
Addition of silicon to aluminium results in
Improvement of casting characteristics
Improvement of corrosion resistance
One of the best known age and precipitation hardening systems
Improving machinability
Crystal structure of a material is, generally, examined by
Naked eye
Optical microscope
Metallurgical microscope
X-ray techniques
White cast iron contains carbon in the form of
Free carbon
Graphite
Cementite
White carbon
Bronze contains
70% copper and 30% zinc
90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel
70 - 75% copper and rest tin
The percentage carbon content in wrought iron is about
0.02
0.1
02
0.4
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Brass
Mild steel
Cast iron
Wrought iron
Steel containing ferrite and pearlite is
Hard
Soft
Tough
Hard and tough
The property of a material which enables it to retain the deformation permanently, is called
Brittleness
Ductility
Malleability
Plasticity
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
Babbitt metal
Monel metal
Nichrome
Phosphor bronze
Which of the following statement is incorrect about duralumin?
It is prone to age hardening
It can be forged
It has good machining properties
It is lighter than pure aluminium
The strength is the ability of a material to resist
Deformation under stress
Externally applied forces with breakdown or yielding
Fracture due to high impact loads
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Provides high hot hardness
Forms very hard carbides and thus increases wear resistance
Promotes retention of austenite
The hardness and tensile strength in austenitic stainless steel can be increased by
Hardening and cold working
Normalising
Martempering
Full annealing
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Copper
Chromium
Nickel
Silicon
Perminvar alloy having constant permeability is an alloy of
Nickel, copper and iron
Nickel, copper and zinc
Copper, nickel and antimony
Iron, zinc and bismuth
Pick up the wrong statement Nickel and chromium in steel help in
Providing corrosion resistance
Improving machining properties
Providing high strength at elevated temperatures
Raising the elastic limit
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Silicon bronze
White metal
Monel metal
Phosphor bronze
Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is
Silver metal
Duralumin
Hastelloy
Invar
The type of space lattice found in alpha-iron is
Face centred cubic space lattice
Body centred cubic space lattice
Close packed hexagonal space lattice
None of these
In nodular iron, graphite is in the form of
Cementite
Free carbon
Flakes
Spheroids
There are fourteen atoms in a unit cell of
Body centred cubic space lattice
Face centred cubic space lattice
Close packed hexagonal space lattice
None of these
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Ferrite and cementite
Cementite and gamma iron
Ferrite and austenite
Ferrite and iron graphite
Cast iron is manufactured in
Blast furnace
Cupola
Open hearth furnace
Bessemer converter
Cartridge brass can be
Cold rolled into sheets
Drawn into wires
Formed into tube
Any one of these
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RC 65
RC 48
RC 57
RC 80
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Equal to
Less than
More than
None of these
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Mild steel
Cast iron
HSS
High carbon
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By adding magnesium to molten cast iron
By quick cooling of molten cast iron
From white cast iron by annealing process
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Eutectic cast irons
Hypoeutectic cast irons
Hypereutectic cast irons
None of these