When a Caterpillar BrakeSaver is used, which of the following is also true?

The correct answer indicates that when a Caterpillar BrakeSaver is utilized, it is associated with the use of a larger capacity engine oil sump. This is significant because the BrakeSaver system relies on hydraulic pressure and engine oil for its operation. A larger oil sump can provide a greater volume of oil, which is crucial for maintaining the necessary hydraulic pressure and ensuring that the BrakeSaver system functions efficiently.

This design consideration helps in improving the overall performance and reliability of the brake system by ensuring that the hydraulic components receive adequate lubrication and cooling, especially during extensive use or when the brakes are under heavy load.

In the context of the other options, while external exhaust brake principles and the integration with the vehicle's ECM are important aspects of brake systems, they do not specifically correlate with the operation of the BrakeSaver in the same way that a larger oil sump does. Additionally, the assertion that retarding efficiency can never be modulated is inaccurate, as systems like the BrakeSaver are often designed to allow for some modulation to enhance braking effectiveness based on driving conditions.