Related Questions

Nickel when added to copper improves
A Machinability
B Hardness
C Hardness and strength
D Strength and ductility
The addition of which of the following improves machining of copper?
A Sulphur
B Vanadium
C Tin
D Zinc
Presence of nickel in steel improves its
A Corrosion resistance
B Cutting ability
C Wear resistance
D All of the above
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
A 12
B 36
C 54
D 68
Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
A 24 %
B 36 %
C 40 %
D 60 %
If 2 kg of metal, of which 1/3 is zine and the rest is copper , be mixed with 3 kg of metal, of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A 17 : 43
B 13 : 42
C 19 : 43
D 15 : 42
If 2 kg of metal, of which 1/3 is zinc and the rest is copper s, be mixed with 3 kg of metal , of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A 13 : 42
B 19 : 43
C 15 : 42
D 17 : 43
The addition of antimony in tin-based alloys improves its
A Rupture strength and hot hardness
B Impact strength and bonding strength
C Deformation resistance
D Wear resistance
Addition of zircon to silica refractory brick improves its
A Crushing strength
B Resistance to slag attack
C Neither A nor B
D Neither A nor B
Addition of silicon to aluminium improves its
A Corrosion resistance
B Machinability
C Castability
D None of these

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