Petrol vs Diesel Engines Quiz

What is the more accurate term to describe petrol and diesel engines?

• Spark ignition and compression ignition

• Turbo ignition and super ignition

• Electric ignition and mechanical ignition

• Hybrid ignition and dual ignition

What is the purpose of a spark plug in a petrol engine?

• To cool down the engine

• To regulate air intake

• To control exhaust emissions

• To create a spark for combustion

What initiates combustion in a diesel engine?

• Compressing the air

• Injecting fuel at high pressure

• Using a spark plug

• Cooling the engine

What is the main reason why diesel engines don't rev as high as petrol engines?

• Low compression ratio

• Lack of fuel injection

• Limited ignition timing control

• Heavy and strong internals

What is the purpose of a diesel particulate filter in a diesel engine?

• To trap or convert nitrogen oxides and soot particles

• To increase fuel efficiency

• To cool down the engine

• To regulate air intake

Why do petrol engines typically have a lower compression ratio than diesel engines?

• To prevent knock

• To increase torque

• To reduce emissions

• To improve fuel efficiency

What is the stoichiometric air-fuel ratio for diesel fuel?

• 14.5 to 1

• 14.7 to 1

• 160 to 1

• 15 to 1

Why do diesels run leaner than petrol engines?

• Heterogeneous air-fuel mixture

• Homogeneous air-fuel mixture

• To increase power output

• To reduce emissions

What is the main reason why diesels are more efficient than petrol engines?

• Lighter engine components

• Higher RPM range

• Use of longer hydrocarbon chains

• Compression of the air-fuel mixture

What is the primary factor that determines the compression ratio of an engine?

• Difference between largest and smallest cylinder volumes

• Engine displacement

• Number of cylinders

• Type of fuel used