According to Bernoulli's principle, a dynamic pump system has which of the following?

Bernoulli's principle states that in a flowing fluid, an increase in the fluid's velocity is accompanied by a decrease in pressure or potential energy. In a dynamic pump system, the fluid experiences changes in pressure and velocity, which directly relate to the pressure head and velocity head.

The aspect of pressure head comes from the pressure exerted by the fluid within the system, involving the energy contributed by the pressure acting on the liquid. As the fluid moves through the system, this pressure plays a crucial role in maintaining flow and overcoming resistance.

The velocity head refers to the kinetic energy of the liquid as it moves through the pipe. This energy is dependent on the speed at which the liquid is traveling. As the fluid accelerates, its velocity head increases, which is a critical factor for the effective operation of a pump.

Since both the pressure head and velocity head are integral components of Bernoulli’s principle as it applies to dynamic pump systems, recognizing that both elements contribute to the overall energy in the system validates the selection of the combined answer. Thus, the correct choice emphasizes the importance of both the pressure head and velocity head in understanding how a dynamic pump operates.