Subtopic: Bio-fuels and their use in farm mechanization
Question Statement:
Sources of Power: Sources of power on the farm — human, animal, mechanical, electrical, wind, solar and biomass; bio-fuels and their use in farm mechanization.
The amount of biogas required to run a diesel engine is 0.65 m³ kW⁻¹h⁻¹. The minimum size of the Deenbandhu model biogas plant in m³ required to run a 1 kW (brake power) diesel engine daily for one hour is
Options:
(A) 1
(B) 2
(C) 3
(D) 4
Official Answer Key:
B
Step-by-Step Solution & Explanation
Daily gas requirement = 0.65 m³/kWh × 1 kW × 1 h = 0.65 m³/day. Deenbandhu model biogas plants, however, are manufactured only in a set of standard digester sizes (commonly starting from 2 m³ and going up in steps such as 2, 3, 4, 6 m³); there is no commercially available 1 m³ (or smaller than 2 m³) Deenbandhu unit. Hence the minimum standard plant size that can meet the (small) 0.65 m³/day requirement is the smallest available size, 2 m³. Answer: (B) 2.
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