Auto Final 1

The closing of the intake/exhaust valves is performed by the

________________.

• Intake Ports

• Cam Lobes

• Valve Springs

• Cylinder Head

What is the purpose of the camshaft?

• Open the intake/exhaust valves

• Close the intake/exhaust valves

• Open and close the intake/exhaust valves

• To shaft the cams

The Acronym TDC means...

• Telephone Direct Call

• Trinidad Digs Chicharrones

• Top Dead Center

• Timing Done Correctly

During an exhaust stroke, exhaust gases are evacuated from the cylinder past an exhaust valve that ___________.

• must be held closed by its valve spring

• must be free to travel as designed

• leads to an opening to the crankcase

• leads directly to atmosphere

What is engine timing?

Choose the best answer

• ignition coils firing at the right time

• closing the knutter valves at the right time

• opening and closing of the valves at the right time

• The relationship between the engine mechanical and electrical operations.

The crankshaft turns at what speed compared to the camshaft? Take a careful look at the gears.

• Same speed

• 1/2 Speed

• 2x Speed

• 1/1 Speed

Cylinder volume with the piston at bottom dead center (BDC) compared to cylinder volume with the piston at top dead center (TDC) is defined as the:

• Compression Ratio

• Piston Comparison

• Piston Aspect Ratio

• Engine Displacement

Technician A states the camshaft opens and closes the valves. Technician B states the crankshaft converts reciprocating force/motion to rotational force/motion. Who is correct?

• Tech A

• Tech B

• Both Techs

• Neither Tech

If a camshaft lobe has been worn down due to material failure:

• The related valve may stick open

• There may be abnormal valve train clatter

• Piston-to-valve contact may occur

• The cylinder may experience compression loss

Tech A states poor engine maintenance may result in sludged oil. Tech B states allowing oil to deteriorate into sludge may cause severe engine damage. Which tech is correct?

• Tech A

• Tech B

• Both techs

• Neither Tech