Related Questions

Silicon percentage in silicon steel used for electrical equipments is about
A 1
B 4.0
C 8
D 14
Silicon percentage in the silicon steel used for electrical appliances/equipments is
A 0.3-0.4
B 12-14
C 3-4
D 20-25
Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
A Chromium
B Nickel
C Tungsten
D Cobalt
__________ addition increases the depth of hardness of steel.
A Chromium
B Nickel
C Tungsten
D Vanadium
An SCR is made of silicon and not germanium because silicon
A Is inexpensive
B Is mechanically strong
C Has small leakage current
D Is tetravalent
The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.
A Carbon
B Manganese
C Both A & B
D Neither A nor B
Addition of silicon to aluminium results in
A Improvement of casting characteristics
B Improvement of corrosion resistance
C One of the best known age and precipitation hardening systems
D Improving machinability
Addition of silicon to cast iron
A Promotes graphite module formation
B Improves its ductility
C Does not promote graphite flakes formation
D Increases the fluidity of molten metal
Addition of silicon to aluminium improves its
A Corrosion resistance
B Machinability
C Castability
D None of these
A steel mill produces 180 tons of steel per month Raw materials cost for each ton of production is Tk. 1200. Other expenses of that mill are Tk. 90,000 in each month what should be the selling price of each ton of steel in order to make 10% profit?
A 1870
B 1845
C 1842
D 18145

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