The GATE Grind

GATE 2025 AG – Question 20

Farm Machinery · Farm Machinery · 1 mark · Multiple choice

A four-row fluted-roller seed drill has row spacing 25 cm, speed 2.5 km/h and desired mustard seed rate 5.0 kg/ha. Seed bulk density is $800\,\mathrm{kg/m^3}$. Find seed volume flow in m³/h.

  1. $.391\times10^{-3}$
  2. $1.172\times10^{-3}$
  3. $1.563\times10^{-3}$
  4. $1.953\times10^{-3}$

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (C) $1.563\times10^{-3}$

Explanation

For repeated passes, the effective width is $4(.25)=1$ m. Area covered per hour is $2500(1)=2500$ m²/h=.25 ha/h. Seed mass flow is $5(.25)=1.25$ kg/h, and volume flow is $1.25/800=.0015625$ m³/h. Thus **$1.563\times10^{-3}$,C**.

More Farm Machinery questions

All Farm Machinery questions →