3MB 4 STROKE ENGINE

Which stroke is designated by the piston moving from TDC to BDC with both the intake and exhaust valves in the closed position? 

• Intake 
• Compression 
• Power 
• Exhaust 

During the intake stroke, ________________________________. 

• Spent gases are forced out of the combustion chamber from the piston's travel from BDC to TDC
• Fuel is supplied to the combustion chamber
• The piston travels from BDC to TDC to compress the fuel charge prior to ignition
• Air - fuel mixture is deposited into the combustion chamber

List the strokes of the 4 - cycle engine theory in order. 

• Intake, Power, Compression, Exhaust 
• Intake, Compression, Power, Exhaust 
• Exhaust, Power, Compression, Intake 
• Compression, Power, Intake, Exhaust 

Compression is best defined as ___________________________. 

• Expanding a small volume into a larger volume 
• Reducing a larger volume into a smaller volume 

Ignition of the charge occurs in between the following two strokes: _________________ and _________________. 

• Intake, Power, 
• Power, Exhaust 
• Compression, Power 
• Intake, Compression 

Compression is a key element of an internal combustion engine. Which engine component supplies the compression needed to power an engine? 

• Crankshaft 
• Ignition Armature 
• Connecting Rod 
• Piston

The piston travels from BDC to TDC with the exhaust open on which stroke? 

• Intake 
• Compression
• Power 
• Exhaust 

During the compression stroke the piston moves________

• up
• in both directions
• the hot gasses out of the cylinder
• down

During the first stroke (Intake), what valves are open-if any?

• Both closed

• Intake valve open, Exhaust closed.

• Both are open

• Intake valve closed, Exhaust valve open.

The movement of the piston in the engine is

• Linear

• Circular

• Reciprocal

• None of the above