Which of the factors listed has the greatest...

Question 1 / 270705eccefa1bacbc34ba4d47385

Question 1 of 270705eccefa1bacbc34ba4d47385

Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?

Question 1 of 27070

Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?

🔍 Key Concepts

• Mechanical efficiency vs. overall efficiency in a diesel engine • How frictional losses inside an engine affect power output • Which listed factors directly consume engine power rather than just influencing operating conditions

💭 Think About

• Ask yourself: Which option represents a force that continually opposes motion of moving parts and directly reduces usable output power? • Which items mostly affect performance indirectly (like combustion quality or engine temperature) instead of being a primary internal loss? • Think about where the engine’s indicated power goes before it becomes brake (shaft) power—what major loss occurs between those two?

✅ Before You Answer

• Be clear on the definition of mechanical efficiency (ratio of brake power to indicated power). • Identify which choice is an internal parasitic loss that increases with speed and load. • Verify which factors mainly change operating conditions (temperature, cleanliness, cooling) vs. directly absorbing mechanical power.

Question 1 of 27070

Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?

Temperature of the intake air.

Friction in the engine.

Type of cooling system.

Type of air filtration system.