Heat Engine Flashcard

Front

What happens to the gas if it is heated inside the engine cylinder?

Back

The gas molecules expand.

Front

In exhaust stroke, what happens to the piston and the mixture of gases?

Back

The piston moves down, the exhaust valve opens, and the burned gas is expelled out through the exhaust valve.

Front

Why is a heat engine not 100% efficient?

Back

Because some of the gases are taken up in the piston.

Front

In which stroke does the piston move upward?

Back

Compression and exhaust.

Front

What is the effect of exhaust gas on the environment?

Back

Air Pollution.

Front

Define a heat engine.

Back

A heat engine is a device that converts thermal energy into mechanical work.

Front

What is the role of the piston in a heat engine?

Back

The piston compresses and expands the gas, facilitating the conversion of heat energy into mechanical work.

Front

What is the purpose of the exhaust valve in a heat engine?

Back

The exhaust valve allows burned gases to exit the engine after the combustion process.

Front

What is the intake stroke in a heat engine?

Back

The intake stroke is when the piston moves down, drawing in a mixture of air and fuel into the cylinder.

Front

What is the power stroke in a heat engine?

Back

The power stroke is when the piston is pushed down by the expanding gases after combustion, producing work.