Related Questions

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
A Cyaniding
B Sheardising
C Spherodising
D None of these
For hardening high alloy steel, it is to be heated slowly and uniformly to avoid
A Local hardening
B Scale formation
C Segregation
D Warpage
Which is false statement about case hardening? Case hardening is done by
A Electroplating
B Cyaniding
C Induction hardening
D Nitriding
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
The gypsys are a tribe of strange people. They do not have any fixed home but wander about from place to place and live in tents. they were originally natives of India. But as they reached England from Egypt ,the English took them from Egyptians. this is why they came to be called gypsys. they were beloved to possess strange powers. they could tell your fortune by reading the palm of your hand. it was thought they stole little children to train them in their way of life. whenever a child got lost it was thought that it has been carried away by gypsys so they were arrested and sent for trial. but this attitude towards the Gypsy has gradually changed.The gypsies are people who ---
A have a settled way of life
B came originally from Egypt to England
C are always on the move
D steal children to train them in the way of life
Secondary hardening in steels arises out of the
A precipitation of fine alloy carbides at high temperature
B refinement of ferrite grain size by working
C decomposition of retained austenite upon heat treatment
D precipitation of complex inter-metallics upon heat treatment
Hardening of steel is not possible, unless it is heated __________ critical point.
A Above the highest
B Above the lowest
C Between the first & second
D Between the second & third
Hardening of steel is not possible unless it is heated __________ critical point.
A Above the highest
B Above the lowest
C Between the first & second
D Between the second & third
'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

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