Question

The flow rate at which turbulence might begin to develop in a water main with a 0.200-m diameter is:

(a) > 2000 L/s
(b) < 2000 L/s
(c) = 2000 L/s
(d) unknown

Answer 1

Turbulence in a water main depends on the flow rate and can be determined by the Reynolds number.

Step-by-step explanation:

Turbulence in a water main with a 0.200-m diameter will begin to develop when the flow rate exceeds a certain threshold. This threshold is determined by the Reynolds number (NR), which is a dimensionless quantity used to predict the type of flow (laminar or turbulent) based on flow rate, fluid properties, and pipe diameter.

For NR values below about 2000, the flow is laminar, for NR values above about 3000, the flow is turbulent, and for NR values between 2000 and 3000, it may be either laminar or turbulent.

Since the question doesn't provide the actual flow rate, we cannot determine whether turbulence will develop or not. Therefore, the correct answer is (d) unknown.