When changing over from residual to...

Question 1 / 2707066636eef28f7522a1c51f7df

Question 1 of 2707066636eef28f7522a1c51f7df

When changing over from residual to distillate fuel on a slow-speed diesel main engine, what is a good guideline to follow regarding the change over?

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Question 1 of 27070

When changing over from residual to distillate fuel on a slow-speed diesel main engine, what is a good guideline to follow regarding the change over?

🔍 Key Concepts

• Difference in viscosity and temperature between residual fuel (HFO) and distillate fuel (MDO/MGO) • Effects of rapid temperature change on fuel system components (pumps, injectors, heaters) • Engine and maker’s recommendations for maximum allowable temperature change rate

💭 Think About

• Think about what happens to pumps, injectors, and fuel pipes if the fuel temperature (and viscosity) changes too quickly. • Is the key concern the total time of the whole changeover, or how fast the temperature of the fuel going to the engine is allowed to change? • Which choice best protects the engine and fuel system from thermal shock and loss of proper atomization at the injectors?

✅ Before You Answer

• Identify which options talk about rate of temperature change versus total elapsed time. • Consider normal fuel temperature differences between heavy fuel oil and marine diesel oil during changeover. • Ask yourself which guideline would be most consistent with a cautious, controlled change that avoids thermal shock and maintains proper viscosity.

Question 1 of 27070

When changing over from residual to distillate fuel on a slow-speed diesel main engine, what is a good guideline to follow regarding the change over?

Rate of temperature change of fuel to the engine should not exceed 2 degrees C per minute.

Change over time should not be less than six hours.

Change over time should not exceed two hours.

Change over should be accomplished as quickly as possible as dictated by engine load.

Question 1 / 2707066636eef28f7522a1c51f7df

Question 1 of 2707066636eef28f7522a1c51f7df

When changing over from residual to distillate fuel on a slow-speed diesel main engine, what is a good guideline to follow regarding the change over?

Back

Question 1 of 27070

When changing over from residual to distillate fuel on a slow-speed diesel main engine, what is a good guideline to follow regarding the change over?