Small Engines #76-100

At low speeds the ignition spark should be supplied closer to TDC.

• True
• False

A four stroke cycle single cylinder engine has one power stroke every four revolutions of the camshaft.

• True
• False

Solid state ignition systems eliminate the conventional breaker points.

• True
• False

The crankshaft in a 4 cycle engine turns at ____________ the speed of the camshaft.

• Twice
• Four times
• One-half
• The same speed as

The 4 cycle single cylinder engine has a power stroke ____________ revolution of the crankshaft.

• Every
• Every other
• Every third
• Twice per

The two materials most widely used in manufacturing small gas engine blocks are:

• Magnesium and cast iron
• Copper and Aluminum
• Aluminum and cast iron
• Tin and zinc

When an engine is operating at 3000 RPM each valve opens and closes in approximately:

• 1 second
• 1/10 of a second
• 1/25 of a second
• 1/50 of a second

An excess of carbon accumulates in the combustion chamber and it causes an increase in the:

• Clearance volume
• Compression ratio
• Stroke
• Piston Displacement

In the 4 cycle small gas engine, how many complete revolutions must the crankshaft make to complete one cycle?

• One
• Two
• Three
• Four

The ring end gap measures 0.045" and the reject size is 0.035". The rings:

• Are still satisfactory
• Must be replaced
• Should be ground down
• Telescoping gauges