Which of the following materials is commonly used for making modern pistons?

Modern pistons are commonly made from aluminum alloy due to its excellent properties that suit the demands of engine performance. Aluminum alloys are lightweight, which helps reduce the overall weight of the engine and contributes to better fuel efficiency. Additionally, aluminum has good thermal conductivity, allowing it to effectively dissipate heat generated during combustion. This helps in maintaining optimal engine temperatures and prevents overheating.

Moreover, aluminum alloys have sufficient strength and durability to withstand the high pressures and temperatures found in combustion engines. The use of aluminum also allows for more complex shapes and designs, enabling better engine performance and efficiency. This combination of lightweight, strength, and thermal properties makes aluminum alloys the preferred choice for modern pistons in automotive applications.