Engine Mechanics #51-68

Valves are held in the closed position by valve guides.

• True

• False

Weak compression may be caused by a leaky head gasket.

• True

• False

Weak compression could not be caused by worn rings.

• True

• False

Cylinders can be resized with a hone.

• True

• False

The compression release is designed to:

• Reduce Vibration

• Prevent Backfiring

• Shut off the engine

• Allow Easier Starting

The compression ratio tells us about the engine's:

• Horsepower

• Torque

• Efficiency

• All of the above

If there is a difference in the size of the valve head, the intake valve is __________ than the exhaust valve.

• The same size

• Smaller

• Larger

Which part of the magneto ignition system converts low voltage into high voltages?

• Armature Laminations

• Permanent Magnets

• Condenser

• Coil

For the valves to open at the proper time the __________ marks must be aligned.

• Spring

• Hobbing

• Timing

• Plug

The purpose of proper ignition timing is to

• Open and close the intake valve at the precise time

• Produce spark at the precise moment

• To prevent air pollution

• To reduce oil consumption