Related Questions

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
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
A 1.5-2
B 3.5-4.5
C 7-9
D 12-14
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
Manganese steels
A Are non-magnetic
B Possess high electrical resistance
C Possess low coefficient of expansion
D All the above
'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
The CPU of a computer transfers print output to a temporary disk memory at high speed and then gets back to processing another job without waiting for the output to got to the printer. In this way, the CPU does not remain idle due to its own high speed as compared to the low speed of the printer. What is the name of this memory?
A External memory
B I/O memory
C ROM
D Buffer memory
E None of the above
High speed cutting tool steels contain about __________ percent of tungsten.
A 6-8
B 18-20
C 30-35
D 50-55
Vanadium in high speed steels
A Promotes decarburisation
B Provides high hot hardness
C Forms very hard carbides and thus increases wear resistance
D Promotes retention of austenite
The alloying element which can replace tungsten in high speed steels is
A Nickel
B Vanadium
C Cobalt
D Molybdenum

Next steps