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
Radiation only
Conduction, convection and radiation

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Automobile Engineering in ME
In radial tyres

All plies run parallel to one another and vertical to tyre bead
None of these
One ply layer runs diagonally one way and another layer runs diagonally the other way
Inner tubes are always used

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