Neco 2019 Agricultural Science Question 4

Practice practical question 4 from the 2019 Neco Agricultural Science examination. This question covers Farm Machinery .

Neco 2019 Agricultural Science Practical

Topic: Farm Machinery

Question 4 NECO • 2019 • AGRICULTURAL_SCIENCE • practical

A small diesel tractor is being tested for its field performance. The tractor has a rated engine power of 20 kW at 2000 rpm. During a field trial the following data are recorded: - Fuel consumed: 4.0 L over a continuous 2‑hour operation. - Draft force measured on a 2‑bottom plough: 3000 N. - The tractor travels a straight 2 km stretch at a constant speed while the draft is recorded. - Width of the plough (effective working width): 2.5 m. - Observed field efficiency (accounting for turns and overlap): 80 %. Using the data above, answer the following questions:

( a )

Calculate the total work (in kilojoules) done by the tractor in pulling the plough over the 2 km distance.

( b )

Determine the average draw‑bar power (in kilowatts) delivered by the tractor during the test.

( c )

Assuming the calorific value of diesel is 9.8 kWh L⁻¹, calculate the overall draw‑bar efficiency of the tractor (percentage).

( d )

Compute the field capacity of the tractor (in hectares per hour) using the given plough width, speed and field efficiency.

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This is Neco 2019 Agricultural Science Question 4. It is one of the practical questions from the 2019 Neco Agricultural Science examination.

The question covers Farm Machinery .

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