Question

For laminar flow in a horizontal pipeline under a constant pressure gradient, a doubling of the diameter results in doubling in FR

T/F

Answer 1

True. Doubling the diameter in laminar flow in a horizontal pipeline under a constant pressure gradient results in a doubling in flow rate (FR).

Step-by-step explanation:

True. For laminar flow in a horizontal pipeline under a constant pressure gradient, a doubling in diameter results in a doubling in flow rate (FR).

This can be explained using Poiseuille's law, which states that the flow rate (Q) of a fluid through a tube is directly proportional to the radius to the fourth power. Therefore, if the diameter is doubled, the radius will also double. Doubling the radius to the fourth power will result in a doubling in flow rate.

For example, let's say the original flow rate (FR) was 10 cm³/s. If the diameter is doubled, the flow rate will also double to 20 cm³/s.