Internal Combustion Engine Quiz

What does the internal combustion engine convert?

• Mechanical energy into combustion energy

• Combustion energy of the fuel into mechanical energy

• Electrical energy into mechanical energy

• Thermal energy into electrical energy

Which type of internal combustion engine is most commonly used in vehicles?

• Jet engine

• Four-stroke reciprocating piston engine

• Two-stroke engine

• Rotary engine

What is the purpose of the valve timing mechanism?

• To open the inlet and exhaust valves

• To convert thermal energy into mechanical energy

• To supply fuel to the engine

• To ignite the fuel-air mixture

How many strokes are there in the operation cycle of a four-stroke engine?

• Two

• Three

• Four

• Five

What happens during the intake stroke?

• The piston compresses the fuel-air mixture

• The piston travels down, and the fuel-air mixture enters the cylinder

• The spark plug ignites the fuel-air mixture

• The piston expels exhaust gases

What is the result of the compression stroke?

• The fuel-air mixture is compressed, raising temperature and pressure

• The cylinder volume expands

• The fuel-air mixture is ignited

• The exhaust gases are expelled

What is the climax of combustion in a four-stroke engine?

• Exhaust stroke

• Compression stroke

• Intake stroke

• Power stroke

What is the function of the exhaust stroke?

• To compress the fuel-air mixture

• To allow the fuel-air mixture to enter the cylinder

• To expel exhaust gases from the cylinder

• To ignite the fuel-air mixture

Which system supplies fuel to the engine?

• Intake system

• Fuel supply system

• Exhaust system

• Cooling system

What is the average crankshaft speed at idle in revolutions per minute (RPM)?

• 500 RPM

• 700 RPM

• 1000 RPM

• 2000 RPM