Related Questions

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
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
Addition of lead and bismuth 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 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
The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?
A 39
B 78
C 117
D 156
Aluminium bronze contains aluminium and copper in the ratio of
A 50 : 50
B 40 : 60
C 60 : 40
D 10 : 90
The machinability of aluminium increases when _________ is added to aluminium.
A Copper
B Magnesium
C Silicon
D Lead and bismuth
Castability of aluminium is increased by the addition of __________ in it.
A Silicon
B Manganese
C Bismuth
D Lead
Addition of silicon to aluminium improves its
A Corrosion resistance
B Machinability
C Castability
D None of these
A computer takes 50 nanoseconds to do an 221 addition. How many addition can it do in 1 second?
A 20 million
B 25 million
C 30 million
D 35 million

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