Engine Mechanical Assessment 1

What is the purpose of the camshaft?

• Open the valves

• Close the valves

• Open and close the valves

• Operate the pistons

• Crankshaft
• Drive shaft
• Camshaft
• Differential

• Bearing
• Valve
• Piston
• Cylinder

• Cylinder Head

• Engine Block

• Piston

• Camshaft block

The action of opening and closing the valves is determined by the size and shape of the
________________.

• Intake Ports
• Cam Lobes
• Ring Gear
• Cylinder Head

The acronym TDC means...

• Telephone Direct Call

• Tread Design Correction

• Top Dead Center

• Timing Done Correctly

The camshaft moves rods that help actuate the:

• Cylinder

• Intake/Exhaust Valves

• Piston

• Crankcase

In the intake stroke, the piston draws in_____

• Air only

• Air and Fuel

• Oil, fuel, and air

• nitro

the exhaust stroke, pulls out the emissions by opening up?

• exhaust moffler 
• exhaust valve
• crankcase 
• cylinder

What is valve timing?

• opening the valve at the right time

• closing the valve at the right time

• opening and closing of the valves at the right time

• not important