In an HFO service system, what is the...

Question 1 / 2707066636eef28f7522a1c51fcb6

Question 1 of 2707066636eef28f7522a1c51fcb6

In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine?

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Question 1 of 27070

In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine?

🔍 Key Concepts

• Typical HFO (Heavy Fuel Oil) circulation path in a main engine supply system • Function and location of the mixing tank/day tank versus settling tank • Purpose of maintaining correct fuel temperature and pressure at the engine inlet

💭 Think About

• Trace the HFO flow from the settling tank, through heaters/booster pumps, to the engine, and then consider where the hot return fuel can go without shocking system temperature or pressure. • Ask yourself: which component in the system is designed to blend returned hot fuel with fresh, cooler fuel before it goes back to the engine? • Consider which tank or suction line would be undesirable for direct hot return fuel due to contamination, sludge disturbance, or poor temperature control.

✅ Before You Answer

• Verify which part of the system is designed as a closed circulation loop around the engine and booster system. • Check which tank is intended mainly for settling and purification, not for constant hot return flow. • Confirm which option maintains stable viscosity/temperature at the engine inlet and avoids upsetting purifier and settling tank operation.

Question 1 of 27070

In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine?

The unconsumed fuel is recirculated back to the fuel injection pumps suction.

The unconsumed fuel is recirculated back to the settling tank.

The unconsumed fuel is recirculated back to the mixing tank (if fitted) or to the day tank.

The unconsumed fuel is recirculated back to the booster pump suction.

Question 1 / 2707066636eef28f7522a1c51fcb6

Question 1 of 2707066636eef28f7522a1c51fcb6

In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine?

Back

Question 1 of 27070

In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine?