Related Questions

Which of the following has no effect on the carbide forming tendency in steels?
A Molybdenum
B Phosphorus
C Chromium
D Vanadium
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
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
'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
Which of the following has the highest gum forming tendency in gosoline?
A Paraffins
B Diolefins
C Aromatics
D Naphthenes
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
A 1800
B 2200
C 2400
D 2700
silicon carbide refractories have very low
A [

A. Refractoriness (

B. Thermal conductivity

B Resistance to thermal shock
C None of these
The alloying element which can replace tungsten in high speed steels is
A Nickel
B Vanadium
C Cobalt
D Molybdenum
Shock resisting steels should possess high
A Hardness
B Toughness
C Tensile strength
D Wear resistance

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