Question

A hydraulic power station has the following major items in the hydraulic circuit. The correct sequence in the direction of flow is: A. Draft tube
B. Runner
C. Guide wheel
D. Penstock
E. Scroll case

• A. D, B, C, A, E
• B. A, B, C, E, D
• C. D, C, E, B, A
• D. A, C, B, D, E

Hint:

Penstock → Guide → Scroll → Runner → Draft tube (flow path in turbines).

Answer 1

The Correct Option is C

Concept: In a hydraulic power plant, water flows through different components in a fixed order to transfer energy efficiently.

Step 1: Start from water source.
Water first enters through penstock: \[ \text{Penstock (D)} \]

Step 2: Flow into guide mechanism.
Guide wheel controls direction and flow rate: \[ \text{Guide wheel (C)} \]

Step 3: Enter scroll case.
Scroll case distributes water uniformly around runner: \[ \text{Scroll case (E)} \]

Step 4: Energy conversion in runner.
Water strikes runner blades and transfers energy: \[ \text{Runner (B)} \]

Step 5: Exit through draft tube.
Draft tube reduces exit velocity and recovers pressure: \[ \text{Draft tube (A)} \]

Step 6: Final sequence.
\[ D \rightarrow C \rightarrow E \rightarrow B \rightarrow A \] Final Answer: \[ \boxed{D, C, E, B, A} \]