Question Bank • QB_IDE_EXP_092 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Wells and Pumps

Subtopic: Design and construction of water wells

Question Statement:

In gravel-packed tubewells, the gravel pack thickness around the slotted well screen typically ranges between:

Options:

  • (A) $7.5 - 15\text{ cm}$
  • (B) $1 - 2\text{ mm}$
  • (C) $50 - 100\text{ cm}$
  • (D) $1.5 - 2.0\text{ m}$

Answer Key:

A

Step-by-Step Solution & Explanation

A standard gravel pack envelope surrounding an agricultural well screen has a radial thickness of $7.5\text{ cm}$ to $15\text{ cm}$ ($3 - 6\text{ inches}$), engineered to retain formation aquifer sand while allowing sand-free inflow.
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