Which energy form does the engine primarily convert into mechanical energy?

Which energy form does the engine primarily convert into mechanical energy?

• A. Nuclear
• B. Thermal
• C. Electrical
• D. Chemical

Answer: (B)

In an engine, the fuel stores chemical energy. When the fuel combusts, that chemical energy is released as heat, or thermal energy. The engine’s moving parts then use that heat to perform work, converting the thermal energy into mechanical energy to power the vehicle. So the energy form primarily converted into mechanical energy is thermal energy. Nuclear energy isn’t involved in a typical engine, electrical energy isn’t the main energy produced inside, and chemical energy is the starting form stored in fuel, not the direct form turned into motion.

In an engine, the fuel stores chemical energy. When the fuel combusts, that chemical energy is released as heat, or thermal energy. The engine’s moving parts then use that heat to perform work, converting the thermal energy into mechanical energy to power the vehicle. So the energy form primarily converted into mechanical energy is thermal energy. Nuclear energy isn’t involved in a typical engine, electrical energy isn’t the main energy produced inside, and chemical energy is the starting form stored in fuel, not the direct form turned into motion.