Question

Flow over a spillway of a dam is to be treated as

• A. Flow over a weir
• B. Flow through an orifice
• C. Flow through a mouthpiece
• D. Flow through a pipeline

Hint:

Remember: \[ \boxed{ \begin{aligned} \text{Weir} &\rightarrow \text{Flow over an opening}\\ \text{Orifice} &\rightarrow \text{Flow through an opening} \end{aligned} } \]

Answer 1

The Correct Option is A

Step 1: Recall the function of a spillway. A spillway allows excess water to flow over the crest of a dam in a controlled manner.

Step 2: Identify the flow type. Since water passes over a crest exposed to the atmosphere, \[ \boxed{\text{Flow over a spillway is treated as flow over a weir}.} \] Hence, \[ \boxed{(A)} \] is the correct answer.