The tensile strength of wrought iron is maximum
Along the lines of slag distribution
Perpendicular to lines of slag distribution
Uniform in all directions
None of the above
Correct Answer :
A. Along the lines of slag distribution
Related Questions
The electric process of steel making is especially adapted to
Alloy and carbon tool steel
Magnet steel
High speed tool steel
All of these
Free carbon in iron makes the metal
Soft and gives a coarse grained crystalline structure
Soft and gives a fine grained crystalline structure
Hard and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure
Structural steel contains following principal alloying elements
Nickel, chromium and manganese
Tungsten, molybdenum and phosphorous
Lead, tin, aluminium
Zinc, sulphur, and chromium
Maximum percentage of carbon in ferrite is
0.025 %
0.06 %
0.1 %
0.25 %
Shock resisting steels should have
Low wear resistance
Low hardness
Low tensile strength
Toughness
Babbitt metal is a
Lead base alloy
Tin base alloy
Copper base alloy
Both (A) and (C) above
Inconel contains
65% nickel, 15% chromium and 20% iron
68% nickel, 29% copper and 3% other constituents
80% nickel and 20% chromium
80% nickel, 14% chromium and 6% iron
Age hardening is related to
Duralumin
Brass
Copper
Silver
Which of the following is the binding material in cemented carbides?
Cobalt
Nickel
Vanadium
Iron
The blade of a power saw is made of
Boron steel
High speed steel
Stainless steel
Malleable cast iron
The bond formed by transferring electrons from one atom to another is called
Ionic bond
Covalent bond
Metallic bond
None of these
The elastic stress strain behaviour of rubber is
Linear
Nonlinear
Plastic
No fixed relationship
Taps dies and drills contain carbon
Below 0.5 %
Below 1 %
Above 1 %
Above 2.2 %
Which of the following is an amorphous material?
Mica
Silver
Lead
Glass
The alloying element which can replace tungsten in high speed steels is
Nickel
Vanadium
Cobalt
Molybdenum
Induction hardening is basically a
Carburising process
Surface hardening process
Core hardening process
None of these
Corrosion resistance of steel is increased by adding
Chromium and nickel
Nickel and molybdenum
Aluminium and zinc
Tungsten and sulphur
The surface hardness of the following order is achieved by nitriding operation
600 VPN
1500 VPN
1000 to 1100 VPN
250 VPN
An important property of high silicon (12-18%) cast iron is the high
Hardness
Brittleness
Plasticity
Ductility
An example of amorphous material is
Zinc
Lead
Silver
Glass
The property of a material due to which it breaks with little permanent distortion, is called
Brittleness
Ductility
Malleability
Plasticity
In which of the following cases, consideration of creep is important
Flywheel of steam engine
Cast iron pipes
Cycle chains
Gas turbine blades
The percentage of carbon in pig iron varies from
0.1 to 1.2%
1.5 to 2.5%
2.5 to 4%
4 to 4.5%
In induction hardening ________ is high.
Current
Voltage
Frequency
Temperature
In low carbon steels, presence of small quantities of sulphur improves
Weldability
Formability
Machinability
Hardenability
The ability of a material to absorb energy in the plastic range is called
Resilience
Creep
Fatigue strength
Toughness
Depth of hardness of steel is increased by addition of
Nickel
Chromium
Tungsten
Vanadium
Free cutting steels
Are used where ease in machining is the criterion
Contain carbon in free form
Require least cutting force
Do not exist
Age-hardening is related with
Stainless steel
Gun metal
German silver
Duralumin
Iron ore is, usually, found in the form of
Oxides
Carbonates
Sulphides
All of these