Chapter 5 Engine Operations Questions

Why must gasoline be atomized for efficient engine operation?

• To increase the weight of the fuel

• To make the fuel more colorful

• To ensure it ignites easily and burns quickly

• To decrease the temperature of the fuel

What is an internal combustion engine?

• An engine where fuel is burned outside the engine

• An engine where an air/fuel mixture is ignited inside the engine

• An engine that uses water as fuel

• An engine that does not require fuel

What is the process called when gasoline is broken up into tiny droplets and mixed with air to produce rapid burning in an engine?

• Combustion

• Atomization

• Vaporization

• Condensation

What happens when the entire surface of each droplet of the air-fuel mixture is exposed to the surrounding air?

• The mixture cools down

• A huge burning area becomes available

• The mixture solidifies

• The mixture evaporates

Why must the force caused by rapidly burning gas be contained and controlled in an engine?

• To prevent the engine from overheating

• To ensure the engine runs quietly

• To perform useful work

• To reduce fuel consumption

What happens when atomized fuel is exposed to the surrounding air and ignited?

• It burns slowly with a small flame.

• It flashes into flame almost instantly.

• It does not ignite at all.

• It produces a large explosion.

Why is a long, cylindrical container with a sliding lid used in the experiment described?

• To prevent the fuel from igniting.

• To allow the lid to travel at a high rate of speed.

• To ensure the fuel burns slowly.

• To keep the air-fuel mixture from escaping.

What is the primary function of the piston in an elementary engine?

• To ignite the fuel mixture

• To act as a cylinder

• To push the crankshaft

• To cool the engine

Which of the following is a basic area of engine operation mentioned in the text?

• Electrical wiring

• Fuel metering

• Aerodynamics

• Hydraulic systems

What happens when the air-fuel mixture in the cylinder is ignited?

• The crankshaft stops

• The piston moves downward

• The piston moves upward

• The engine cools down