Small engine CDE-1

What is the correct order of the strokes in a 4-stroke cycle engine?

• intake, exhaust, compression and power

• intake, compression, exhaust and intake

• intake, power, compression and exhaust

• intake, compression, power and exhaust

On the ________ stroke of an engine, the piston is going down, one valve is open and the other valve is closed and air and fuel are being drawn into the cylinder.

• a. intake

• b. exhaust

• c. power

• d. compression

On the ________ stroke of an engine, the piston is going up, one valve is open and the other valve is closed and the fumes are leaving the cylinder.

• a. intake

• b. exhaust

• c. power

• d. compression

On which two strokes are both valves closed?

• a. intake and exhaust

• b. compression and power

• c. intake and compression

• d. power and exhaust

The intake valve is cooled by:

• a. incoming air/fuel mixture

• b. air circulation

• c. radiator

• d. oil

The exhaust valve is difficult to cool because of:

• a. the spark plug being placed directly above it

• b. incoming fuel mixture

• c. hot water surrounding it

• d. high temperature exhaust gases

The exhaust valve is made of:

• a. a very special steel

• b. copper

• c. brass

• d. carbide

A single cylinder Briggs and Stratton engine has:

• a. 1 valve

• b. 4 valves

• c. 2 valves

• d. 3 valves

Valves have a direct effect on:

• a. compression

• b. displacement

• c. compression ratio

• d. horsepower

If the intake valve fails in a one-cylinder engine, the engine will:

• a. run poorly

• b. stop

• c. idle high

• d. back fire