Ans. In pipe systems, there are three main types of flow patterns: laminar flow, transitional flow, and turbulent flow. Laminar flow occurs at low velocities and is characterized by smooth and orderly fluid motion. Transitional flow is an intermediate flow regime between laminar and turbulent flow, while turbulent flow occurs at high velocities and is characterized by chaotic and irregular fluid motion. The type of flow pattern in a pipe system depends on factors such as fluid properties and pipe dimensions.