Neco 2025 Agricultural Science Question 10

Practice objective / multiple choice question 10 from the 2025 Neco Agricultural Science examination.

Neco 2025 Agricultural Science Objective / Multiple Choice Medium Difficulty
Question 10 NECO • 2025 • AGRICULTURAL_SCIENCE • objective

A two‑stroke engine delivers \(5\) kW at \(3000\) rpm. A rotary tiller requires a torque of \(150\) Nm at \(1200\) rpm for optimal operation. Assuming a mechanical efficiency of 85\% in the power transmission, (a) calculate the gear ratio (output:input) needed to match the engine speed to the tiller speed, and (b) determine the effective torque transmitted to the tiller. State whether the available torque meets the tiller's requirement and, if not, the shortfall.

Answer Options

Correct Answer A. Gear ratio 5:2, effective torque ≈ 33.8 Nm, shortfall ≈ 116.2 Nm
B. Gear ratio 2:5, effective torque ≈ 33.8 Nm, shortfall ≈ 116.2 Nm
C. Gear ratio 5:2, effective torque ≈ 40.2 Nm, shortfall ≈ 109.8 Nm
D. Gear ratio 3:1, effective torque ≈ 45.0 Nm, shortfall ≈ 105.0 Nm
Correct Answer
A
Correct Option:
Gear ratio 5:2, effective torque ≈ 33.8 Nm, shortfall ≈ 116.2 Nm

About This Question

This is Neco 2025 Agricultural Science Question 10. It is one of the objective questions from the 2025 Neco Agricultural Science examination.

Difficulty level: Medium .

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