Fuel Properties Quiz

Which fuel has a slightly higher calorific value, diesel or petrol?

• Diesel

• Petrol

• Both have the same value

• Neither has a calorific value

What is the calorific value of petrol?

• 45.5 MJ/kg

• 45.8 MJ/kg

• 50.0 MJ/kg

• 40.0 MJ/kg

Why should extreme care be taken with petrol?

• It is highly viscous

• It has a low flash point

• It is non-flammable

• It is very dense

Which of the following is NOT a synonym for auto-ignition?

• Pre-ignition

• Knocking

• Pinging

• Combustion

What is the percentage of carbon in petrol?

• 16%

• 84%

• 87%

• 11%

What is the percentage of sulphur in diesel?

• 1%

• 11%

• 87%

• 16%

Which element is present at 84% in petrol?

• Hydrogen

• Carbon

• Sulphur

• Oxygen

Which element is present at 87% in diesel?

• Hydrogen

• Carbon

• Sulphur

• Oxygen

What does a rich air-fuel mixture cause?

• Excessive soot particles

• High cylinder temperatures

• Excessive NOx emissions

• Low engine power

What does the term "stoichiometric" refer to in air-fuel mixtures?

• Perfect combustion

• Excessive fuel

• Excessive air

• Incomplete combustion