With the aid of a diagram, describe the working of water-cooling system of a tractor engine 

Process

• Water pump pushes the coolant through the engine block and cylinder head where it absorbs head.
• The hot coolant flows to the radiator where heat is lost to the surrounding through the radiator fins. This is promoted by the fan that draws air through the radiator.
• The thermostat controls the flow of coolant to maintain the engine temperature

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