Mode of heat transfer involved in the cooling of air cooled internal combustion engine is
A. Conduction
B. Natural convection
C. Forced convection
D. None of these
Answer: Option B
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Mode of heat transfer involved in the cooling of air cooled internal combustion engine is
A. Conduction
B. Natural convection
C. Forced convection
D. None of these
The correct answer is: C. Forced convection
Explanation:
In an air-cooled internal combustion engine, cooling is achieved by forcing air over the engine's external surfaces (like fins on the cylinder and cylinder head). This is typically done using a fan or by the vehicle's movement forcing air over the engine.
Conduction occurs within the solid engine parts (from the hot combustion chamber to the outer surface), but it is not the main mode of heat removal.
Natural convection involves heat transfer due to natural buoyancy-driven fluid movement, but air-cooled engines use forced air flow.
Forced convection is the dominant mode in removing heat from the engine to the air.
✅ Correct answer: C. Forced convection