Final answer:
The number of hydraulic pumps in the BLUE system is not provided, but hydraulic systems generally have a motorized pump. These systems operate based on Pascal's Principle, where an applied force on one piston results in a larger force on another piston with a larger surface area.
Step-by-step explanation:
The number of hydraulic pumps in the BLUE system is not explicitly stated in the provided information. However, it is important to note that many hydraulic systems, such as those in power brakes and bulldozers, contain a motorized pump that does most of the work within the system. To understand how hydraulic systems operate, one could reference Figure 14.16, which depicts a typical hydraulic system consisting of two fluid-filled cylinders, pistons, and a connecting hydraulic line. The exertion of a force on one piston results in a larger force on the other piston due to differences in surface area, demonstrating an application of Pascal's Principle. An increase in the number of pumps or cylinders within a hydraulic system can modify the force output or the distance through which each part of the system can move.