The GATE Grind

GATE 2020 AG – Question 40

Irrigation and Drainage Engineering · Soil-Water-Plant Relationship · 2 marks · Multiple choice

Match P hydraulic conductivity, Q permeability, R viscosity, S surface tension, T saturation capacity, U field capacity with 1 upper available-moisture limit for plants, 2 all pores filled, 3 capillarity, 4 fluid-and-soil property, 5 medium property, 6 internal flow friction.

  1. P–4,Q–5,R–6,S–3,T–1,U–2
  2. P–5,Q–4,R–6,S–3,T–2,U–1
  3. P–4,Q–5,R–3,S–6,T–2,U–1
  4. P–4,Q–5,R–6,S–3,T–2,U–1

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Show answer and explanation

Correct answer: (D) P–4,Q–5,R–6,S–3,T–2,U–1

Explanation

Hydraulic conductivity combines medium and fluid effects (4), whereas intrinsic permeability belongs to the medium (5). Viscosity gives internal friction (6) and surface tension produces capillarity (3). Saturation fills all pores (2); field capacity is the upper retained-water limit relevant to availability (1). Thus D.

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