Correct Answer - Option 4 : Motorcyles
Explanation:
-
Motorcycle uses air cooling for the sake of reducing weight and complexity.
- An air cooled engine is simpler to design then the water cooled engine because the heat is transferred from the cylinder and head directly to the air.
- There is no need for water jackets, water pumps and radiator in air cooled system.
- Air cooled system uses many fin on the cylinder and head for effective heat transfer that occurs between two medium.
Examples of Air Cooled and Water Cooled system:
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Air Cooled System: General aviation aircraft, Lawn motors, Generators, pump sets and Motorcycles.
-
Water Cooled System: Internal combustion engine of heavy vehicle, Personal computer to lower the temperature of CPUs.
Difference between Air cooled and Water Cooled System:
| S.No. |
Air Cooled System |
Water Cooled System |
| 1 |
Initial maintenance cost is low due to simple construction |
Cost is high due to complicated construction |
| 2 |
No handling problem with air |
Difficult to handle |
| 3 |
No problem in disposing of used air |
There is a problem of disposing of used water unless a recirculation system is provided |
| 4 |
The fouling effect is low since no corrosion |
Fouling effects are high due to corrosion inside tubes |
| 5 |
Low heat transfer capacity due to low thermal conductivity of air |
They have high heat transfer due to the high thermal conductivity of water |
| 6 |
Used for low capacity |
Used for large capacity |
