Related Questions

Aluminium bronze contains aluminium and copper in the ratio of
A 50 : 50
B 40 : 60
C 60 : 40
D 10 : 90
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because
A Belts are available in sets
B Only one belt cannot be fitted with other used belts
C The new belt will carry more than its share and result in short life
D New and old belts will cause vibrations
Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is
A 38
B 26
C 16
D 4
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
Due to which of the following reasons copper and aluminium are not used for heating elements ?
A Both have great tendency for oxidation
B Both have low melting point
C Very large length of wires will be required
D All of the above
The machinability of aluminium increases when _________ is added to aluminium.
A Copper
B Magnesium
C Silicon
D Lead and bismuth
For aluminium, as compared to copper, all the following factors have higher values except
A Specific volume
B Electrical conductivity
C Coefficient of linear expansion
D Resistance per unit length for same cross-section
The weight of an aluminium conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is
A 50 %
B 60 %
C 100 %
D 150 %
Addition of copper 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

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