Understanding Carburetors in Engines

What is the primary function of a carburetor in an engine?

• To cool the engine

• To mix the right amount of gasoline with air

• To increase the engine's horsepower

• To reduce engine noise

What happens when an engine "runs lean"?

• The engine runs smoothly

• The engine runs very smoky

• The engine may not run or could be damaged

• The engine becomes more fuel-efficient

What is a consequence of an engine "running rich"?

• The engine runs more efficiently

• The engine may flood and run poorly

• The engine produces less emissions

• The engine runs cooler

Why are carburetors still used in small equipment like lawn mowers and chain saws?

• They are more efficient than fuel injection

• They are simple and inexpensive

• They produce less emissions

• They increase the power output

Which of the following is NOT a primary job of a small gas engine carburetor?

• To work when the engine is cold

• To work when the engine is idling

• To work when the engine is wide open

• To increase the engine's speed

What is becoming nearly universal in new cars for better fuel efficiency and lower emissions?

• Carburetors

• Fuel injection

• Turbochargers

• Superchargers

What is the effect of a carburetor mixing too much fuel with air?

• The engine runs lean

• The engine runs rich

• The engine runs efficiently

• The engine runs quietly

Which of the following is a potential problem when an engine "runs rich"?

• The engine runs cooler

• The engine stalls easily

• The engine becomes more powerful

• The engine uses less fuel

What is one reason why fuel injection is preferred over carburetors in new cars?

• It is cheaper to manufacture

• It provides better fuel efficiency

• It is easier to repair

• It increases engine noise

What is a lean mixture: 

•  If there is not enough fuel mixed with the air

•  If there is too much fuel mixed with the air

• the engine will run fine on it