Marine Engine Cooling Quiz

What are the two cooling mediums used to cool marine engines?

• Air and Water

• Oil and Gas

• Steam and Ice

• Sand and Gravel

What is one advantage of air cooling in engines?

• It requires a lot of maintenance.

• The engine can run hotter and is slightly more efficient.

• It uses coolant to prevent rust.

• It makes the engine quieter.

What is a disadvantage of air cooling related to noise?

• It makes the engine quieter.

• It deadens the sound of combustion.

• There is no water to deaden the sound, so they are noisier.

• It reduces the noise of the engine.

Why might air cooling lead to mechanical failure in engines?

• It cools the engine too much.

• Ducting leaks can raise the ambient air temperature.

• It uses too much water.

• It prevents dust buildup.

What is a maintenance challenge of air cooling in covered boats?

• Cleaning fins and maintaining ducts tends to nullify the maintenance advantage.

• It requires frequent oil changes.

• It needs constant refueling.

• It involves regular coolant replacement.

What is one advantage of a water-cooled system?

• It requires less maintenance.

• It quietens the engine noise.

• It does not corrode metal.

• It uses no water.

Which of the following is a disadvantage of a water-cooled system?

• It is less complex.

• It does not require holes through the hull.

• Water corrodes metal and freezes.

• It uses a lot of water.

Why might water-cooled systems be less costly in terms of spare parts?

• They use marine-specific parts.

• Most spares are available from "non-marine" sources.

• They require no spare parts.

• They use expensive materials.

What is a benefit of water's specific heat capacity in water-cooled systems?

• It requires more water to carry heat.

• A small quantity of water can carry away a lot of heat.

• It makes the system more complex.

• It increases engine noise.

Which of the following is a method of cooling a marine engine?

• Air cooled

• Solar cooling

• Geothermal cooling

• Nuclear cooling