Four Stroke Theory Review

What are the two orientations of engines mentioned in the video?

• Vertical and Horizontal

• Vertical and Diagonal

• Horizontal and Diagonal

• Vertical and Circular

Which type of shaft engine is the most common?

• Horizontal shaft engine

• Vertical shaft engine

• Diagonal shaft engine

• Circular shaft engine

What are the three conditions necessary for engine operation?

• Air and fuel supply, Ignition source, Compression

• Air and fuel supply, Cooling system, Compression

• Ignition source, Cooling system, Exhaust

• Compression, Exhaust, Cooling system

How many full revolutions of the crankshaft are needed to complete the four strokes?

• 1

• 2

• 3

• 4

What is the main role of the camshaft?

• To open and close the intake and exhaust valves

• To increase engine speed

• To supply fuel to the engine

• To cool the engine

What component contains a magnet to make electricity for the ignition armature?

• Camshaft

• Crankshaft

• Flywheel

• Spark plug

During the intake stroke, what happens to the piston and the intake valve?

• The piston moves up and the intake valve closes

• The piston moves down and the intake valve opens

• The piston moves up and the intake valve opens

• The piston moves down and the intake valve closes

What happens to the intake and exhaust valves during the compression stroke?

• Both are open

• Intake is open, exhaust is closed

• Both are closed

• Intake is closed, exhaust is open

During the power/combustion stroke, what component creates electricity that is amplified into volts?

• Piston

• Camshaft

• Magnet on the flywheel

• Crankshaft

In the exhaust stroke, what is the purpose of creating a vacuum in the combustion chamber?

• To increase fuel efficiency

• To initiate the intake stroke

• To cool the engine

• To reduce emissions