What does B.D.C. stand for in engine terms?

• Bottom Dead Centre

• Base Drive Control

• Balanced Dynamic Cycle

• Basic Distance Calculation

What is the relationship between stroke and T.D.C. and B.D.C.?

• Stroke is the distance between T.D.C. and B.D.C.

• Stroke is the time taken to reach T.D.C.

• Stroke is the speed of the piston at B.D.C.

• Stroke is the pressure at T.D.C.

During the Compression Stroke, what is the state of the valves?

• Both open

• Both closed

• Inlet open, exhaust closed

• Inlet closed, exhaust open

What initiates the Power Stroke in a four-stroke petrol engine?

• Compression

• Spark

• Exhaust

• Induction

What is the sequence of strokes in a four-stroke petrol engine?

• Induction, Compression, Power, Exhaust

• Compression, Induction, Power, Exhaust

• Power, Induction, Compression, Exhaust

• Exhaust, Power, Compression, Induction

What is the main function of the piston in an engine?

• To convert fuel energy into mechanical energy

• To ignite the air-fuel mixture

• To release exhaust gases

• To allow air-fuel mixture into the cylinder

What stroke am I, piston moving down the cylinder, 1 valve open, 1 valve closed?

• Compression

• Induction

• Exhaust

• Power

What happens to the gases in the sump during the downward stroke?

• They are ignited

• They are compressed

• They are exhausted

• They are transferred

What is the direction of the piston during the power/exhaust phase?

• Upward.

• Downward.

• Sideways.

• Rotational.

What is the primary function of the exhaust port in a two-stroke engine?

• To release exhaust gases.

• To intake air.

• To compress fuel.

• To ignite the mixture.