Hotel Service Unit 7 Marine diesel oil Flashcards

What does the water crackle test help detect in fuel?

B) Presence of water

What is a key reason for dipping tanks before and after bunkering?

C) To accurately measure the fuel volume transferred, helping prevent disputes

Which of the following items of information is typically included on a bunker delivery note, excluding density, viscosity, and flash point?

B) The sulfur content of the fuel

What is the flash point of marine diesel oil?

B) The lowest temperature at which the fuel can vaporize to form a flammable mixture in air, measured in degrees Celsius (°C)

When must a letter of protest be issued during bunkering operations?

B) When there is a dispute over the quantity or quality of fuel supplied

What is the definition of density in the context of marine diesel oil?

B) The mass of the oil per unit volume, usually expressed in kilograms per cubic meter (kg/m³)

Why is the ASTM D95 test important for marine diesel oil?

B) It determines the fuel’s water content, ensuring it is within safe operational limits

Which of the following is another item typically found on a bunker delivery note?

B) The volume of fuel delivered, usually measured in metric tons or cubic meters

Which of the following is a possible source of fuel contamination by water on board a vessel?

C) Condensation forming in fuel tanks

What is the definition of viscosity in the context of marine diesel oil?

B) The resistance of the oil to flow, typically measured in centistokes (cSt)

What is another source of water contamination in fuel on board a vessel?

B) Leaking steam pipes or cooling water systems near fuel tanks

Which of the following is a possible consequence of water contamination in marine diesel oil?

B) Poor combustion and reduced engine performance

Which additional item is included on a bunker delivery note?

B) The fuel’s delivery temperature

Which of the following is another test that can detect water in marine diesel oil?

B) ASTM D95 distillation test

Which of the following is a common item found on a bunker delivery note?

B) The port of delivery

What can happen if significant amounts of water are present in marine diesel oil?

B) It can cause corrosion in fuel system components

Which of the following is a test that can indicate the presence of water in marine diesel oil?

B) Water crackle test

Which of the following is another potential consequence of water contamination in fuel?

A) Blockage of fuel filters

Why is the chief engineer responsible for issuing a letter of protest during bunkering?

A) The chief engineer is in charge of managing fuel operations, including monitoring quality and quantity

Which of the following is a source of water contamination in marine diesel oil?

B) Seawater entering the fuel system during bunkering

Who is responsible for issuing the letter of protest during bunkering operations?

B) The chief engineer

Why is it important to dip the suppliers' tanks prior to and after receiving fuel during bunkering operations?

B) To verify the fuel quantity delivered matches the amount ordered and to check for discrepancies

What is a letter of protest in the context of bunkering marine diesel oil?

B) A formal document issued when there is a discrepancy in fuel quantity or quality, or if safety procedures were not followed during bunkering

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