Heavy Duty Technician Practice Exam

Modern engines, particularly internal combustion engines used in vehicles, have significantly improved in terms of power output compared to older steam engines. The correct answer indicates that modern engines can produce twice the power of steam engines, which is a reasonable representation based on technological advancements, efficiency improvements, and the ability to extract energy more effectively from fuels.

Steam engines, while revolutionary during their time, had limitations in terms of efficiency and mechanical design. Modern engines benefit from advanced materials, fuel injection systems, turbocharging, and engine management technologies that optimize performance. As a result, the power-to-weight ratio and overall output of contemporary engines have been substantially enhanced compared to their steam-powered predecessors.

The choice reflecting that modern engines produce twice the power emphasizes the significant leap in engineering and technology, offering a clear benchmark for comparison with older engines, rather than underestimating or overestimating the advances made.