The electric process of steel making is especially adapted to
Alloy and carbon tool steel
Magnet steel
High speed tool steel
All of these
Correct Answer :
D. All of these
Related Questions
Age hardening is related to
Duralumin
Brass
Copper
Silver
In nodular iron, graphite is in the form of
Cementite
Free carbon
Flakes
Spheroids
The percentage carbon content in wrought iron is about
0.02
0.1
02
0.4
Which of the following impurity in cast iron makes it hard and brittle?
Silicon
Sulphur
Manganese
Phosphorus
Bronze is an alloy of
Copper and zinc
Copper and tin
Copper, tin and zinc
None of these
Which of the following pipes is least corrosion resistant?
Brass
Mild steel
Cast iron
Wrought iron
Tin base white metals are used where the bearings are subjected to
Large surface wear
Elevated temperatures
Light load and pressure
High pressure and load
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces
White cast iron
Nodular cast iron
Malleable cast iron
Alloy cast iron
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will
Increase
Decrease
Remain same
First increase and then decrease
Monel metal is an alloy of
Nickel and copper
Nickel and chromium
Nickel, Chromium and iron
Copper and chromium
The lower critical point for all steels is
600°C
700°C
723°C
913°C
If a refractory contains high content of silicon, it means refractory is
Acidic
Basic
Neutral
Brittle
Induction hardening is basically a
Carburising process
Surface hardening process
Core hardening process
None of these
Tungsten in high speed steel provides
Hot hardness
Toughness
Wear resistance
Sharp cutting edge
The charge is fed into the blast furnace through the
Stack
Throat
Bosh
Tyres
Phosphor bronze contains
0.5% of phosphorous
1% phosphorous
2.5% phosphorous
None of the above
The heat treatment process used for softening hardened steel is
Carburising
Normalising
Annealing
Tempering
Which of the following display properties similar to that of steel?
Blackheart cast iron
White-heart cast iron
Both (A) and (B)
None of these
Which of the following statement is true about brittle fracture?
High temperature and low strain rates favour brittle fracture
Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Brittle fracture is always preceded by noise
Cup and cone formation is characteristic for brittle materials
Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is
Silver metal
Duralumin
Hastelloy
Invar
Quenching is not necessary when hardening is done by
Case hardening
Flame hardening
Nitriding
Any one of these
In basic Bessemer process, the furnace is lined with
Silica bricks
A mixture of tar and burnt dolomite bricks
Both (A) and (B)
None of these
The crystal of alpha iron is
Body centered cubic
Face centered cubic
Hexagonal close packed
Cubic structure
The machinability of aluminium increases when __________ is added to aluminium.
Copper
Magnesium
Silicon
Lead and bismuth
Iron ore is, usually, found in the form of
Oxides
Carbonates
Sulphides
All of these
Inconel is an alloy of
Nickel, chromium and iron
Nickel, copper
Nickel, Chromium
Nickel, zinc
Steel with ________ carbon is known as hypo-eutectoid steel.
0.8 %
Below 0.8 %
Above 0.8 %
None of these
When a steel containing ________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
Equal to
Less than
More than
None of these
Which of the following steel making process is being adopted at Rourkela (in India) Steel Plant?
Bessemer process
Open hearth process
Electric process
LD process
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio
50 : 50
30 : 70
70 : 30
40 : 60