Waec Model Questions Vol1 2019 Agricultural Science Question 48
Practice objective / multiple choice question 48 from the 2019 Waec Model Questions Vol1 Agricultural Science examination.
The diagram shows a tractor pulling a disc harrow. The disc harrow has a working width of 2.4 m. The draft coefficient is 150 N per metre of width per km h⁻¹ of forward speed. The tractor moves at 5 km h⁻¹ and its engine can deliver a continuous power of 45 kW. Assuming a mechanical efficiency of 0.80 and an additional 10 % power allowance for transmission losses, determine the power required to pull the harrow and state whether the tractor's engine power is sufficient.
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About This Question
This is Waec Model Questions Vol1 2019 Agricultural Science Question 48. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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