Neco Model Questions Vol1 2020 Agricultural Science Question 4

Practice practical question 4 from the 2020 Neco Model Questions Vol1 Agricultural Science examination. This question covers Farm Machinery .

Neco Model Questions Vol1 2020 Agricultural Science Practical
Topic: Farm Machinery
Question 4 NECO_MODEL_QUESTIONS_VOL1 • 2020 • AGRICULTURAL_SCIENCE • practical

A small motorised threshing machine is being evaluated for its performance on paddy. The following data were obtained during a one‑hour test run: - Fuel consumption: 0.80 L of diesel. - Diesel price: ₦180 per litre. - Energy content of diesel: 38 MJ L⁻¹. - Quantity of paddy processed: 150 kg (moisture content 12 %). - Specific mechanical energy required to thresh paddy at this moisture level: 0.5 kJ kg⁻¹. - The machine’s rated engine power is 5 kW. Using the information above, answer the questions that follow:

Question Parts

( a )
Calculate the total energy supplied to the engine from the diesel consumed during the test (in megajoules).
( b )
Determine the total mechanical energy required to thresh the 150 kg of paddy (in kilojoules).
( c )
Compute the overall energy efficiency of the threshing operation (percentage).
( d )
Calculate the cost of processing one kilogram of paddy (in naira).
( e )
Suggest two practical measures that could be adopted to improve the overall efficiency of the threshing operation, and briefly explain how each measure would help.

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About This Question

This is Neco Model Questions Vol1 2020 Agricultural Science Question 4. It is one of the practical questions from the 2020 Neco Model Questions Vol1 Agricultural Science examination.

The question covers Farm Machinery .

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