Answer :
Final answer:
In a typical port fuel-injection system c. The injectors at the bends in the rail injectors are most subject to becoming restricted.
Explanation:
In a typical port fuel-injection system, fuel injectors are responsible for delivering a precise amount of fuel to the engine's cylinders. These injectors can become restricted over time due to various factors, affecting engine performance. Among the options provided, the injectors most subject to becoming restricted are the ones located at the bends in the fuel rail.
Fuel rail bends are areas where the fuel flow encounters changes in direction. These abrupt turns can create conditions that are more conducive to the formation of deposits and impurities within the fuel, which can lead to injector clogging or restriction. Over time, these restrictions can cause poor fuel atomization, uneven fuel distribution, and ultimately affect the engine's performance and fuel efficiency.
While other factors like fuel quality and maintenance practices can also influence injector restriction, the bends in the fuel rail are particularly vulnerable due to the potential for fuel flow disruption. Therefore, the correct answer is option c - the injectors at the bends in the rail.
Regular maintenance, such as using high-quality fuel, periodic injector cleaning, and following manufacturer recommendations, can help mitigate the risk of injector restriction and ensure optimal engine performance. (Option c)
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