Related Questions

Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its
A Corrosion resistance
B Tensile strength
C Machinability
D Compressive strength
In low carbon steels, presence of small quantities of sulphur improves
A Weldability
B Formability
C Machinability
D Hardenability
Steels with high carbon equivalent have poor weldability, because in these steels during welding
A Carbon and other alloying elements get oxidised from the weld pool
B Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld
Low carbon steels are those in which carbon percentage is around
A 0.1 to 0.35
B 0.4 to 0.7
C 0.8 to 1.5
D 1.5 to 2
The most reactive allotropic form of phosphorus is __________ phosphorus.
A Red
B Yellow
C Violet
D Black
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about
A 0.1
B 1
C 2.5
D 3.5
For hardening alloy steels and high speed steels, they are heated to
A 1100 to 1300°C
B 1300 to 1500°C
C 500 to 600°C
D 700 to 900°C
'Killed steels' are those steels
A Which are destroyed by burning
B Which after their destruction are recycled to produce fresh steel
C Which are deoxidized in the ladle with silicon and aluminium
D In which carbon is completely burnt
Ferric stainless steels compared to austenitic stainless steels
A Have lower corrosion resistance
B Are harder to fabricate
C Are less ductile and hence less suitable for cold pressing
D All of the above
Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as
A Bessemer pig
B Grey or foundry pig
C White or forge pig
D Mottled pig

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