Automobile Engineering in ME
The heat transfer from coolant to air in the radiator of an automobile engine takes place by

Convection and radiation
Convention only
Conduction, convection and radiation
Radiation only

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Automobile Engineering in ME
The composition of the electrolyte in a fully charged battery is that

The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight
The electrolyte is pure sulphuric acid
The electrolyte is pure distilled water

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