The diagram shows a tractor equipped with a 50 kW diesel engine. The transmission efficiency is 85 %. At a forward speed of 5 km h⁻¹ the drawbar pull measured on the implement is 12 kN. The tractor's specific fuel consumption is 210 g kW⁻¹ h⁻¹ and diesel density is 0.85 kg L⁻¹.

(i) Calculate the effective power transmitted to the implement (in kW).
(ii) Determine the fuel consumption in litres per hour when operating at this condition.
(iii) The farm requires a drawbar pull of 15 kN for a particular operation. Can this tractor meet that requirement?

Question

The diagram shows a tractor equipped with a 50 kW diesel engine. The transmission efficiency is 85 %. At a forward speed of 5 km h⁻¹ the drawbar pull measured on the implement is 12 kN. The tractor's specific fuel consumption is 210 g kW⁻¹ h⁻¹ and diesel density is 0.85 kg L⁻¹.

(i) Calculate the effective power transmitted to the implement (in kW).
(ii) Determine the fuel consumption in litres per hour when operating at this condition.
(iii) The farm requires a drawbar pull of 15 kN for a particular operation. Can this tractor meet that requirement?

Accepted Answer

Effective power ≈ 19.6 kW; fuel consumption ≈ 4.8 L h⁻¹; tractor cannot supply 15 kN drawbar pull

Gce Model Questions Vol1 2018 Agricultural Science Question 30

Answer Options

About This Question

Master the Exam!