Diesel Fuel System

What is the primary use of fuel oil?

• As a lubricant

• For generating heat in boilers

• As a cleaning agent

• For cooling engines

Which of the following is NOT a component of fuel oil?

• Alkanes

• Cycloalkanes

• Aromatics

• Alcohols

What is the most common type of diesel fuel?

• Biodiesel

• Petroleum-derived diesel

• Bioethanol

• Kerosene

What does ULSD stand for?

• Ultra-Low Sulphur Diesel

• Ultra-Light Sulphur Diesel

• Ultra-Low Sulphur Density

• Ultra-Light Sulphur Density

What does the cetane number measure?

• The viscosity of diesel fuel

• The ease of ignition of diesel fuel

• The boiling point of diesel fuel

• The sulfur content in diesel fuel

What is the significance of the octane number?

• It measures the fuel’s tendency to ignite spontaneously

• It measures the fuel’s resistance to knocking

• It measures the fuel’s sulfur content

• It measures the fuel’s viscosity

Which ASTM standard is used to determine the specific gravity of diesel fuel?

• ASTM D 1298

• ASTM D 86

• ASTM D 93

• ASTM D 613

What is the flash point of a fuel?

• The temperature at which the fuel ignites spontaneously

• The lowest temperature at which the fuel vapor and air mixture ignites

• The boiling point of the fuel

• The freezing point of the fuel

What does a high cetane number indicate?

• Slow ignition of the fuel

• High sulfur content

• Quick ignition of the fuel

• High viscosity

Which method is used to calculate the cetane index?

• ASTM D 1298

• ASTM D 86

• ASTM D 93

• ASTM D 976