Allied & ICAR Exam Bank • ALLIED_0193 NAT • 2 Marks

Section 2: Farm Machinery

Farm Machinery

Subtopic: Calculation of performance parameters – field capacity, efficiency, performance index, application rate and losses

Question Statement:

A hydraulic sprayer nozzle delivers $0.6\text{ L/min}$ at pressure $200\text{ kPa}$. If the operating pressure is increased to $800\text{ kPa}$, the new discharge in L/min is:

Answer Key:

1.2

Step-by-Step Solution & Explanation

For hydraulic orifices, $Q \propto \sqrt{P}$. $Q_2 = Q_1 \sqrt{P_2 / P_1} = 0.6 \times \sqrt{800 / 200} = 0.6 \times \sqrt{4} = 0.6 \times 2 = 1.2\text{ L/min}$.
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