Allied & ICAR Exam Bank • ALLIED_0819 NAT • 2 Marks

Section 2: Farm Machinery

Farm Machinery

Subtopic: Functional requirements, principles of working, construction and operation of manual, animal, tractor and renewable energy operated equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting, harvesting and threshing

Question Statement:

A hydraulic spray nozzle delivers discharge $q_1 = 1.2\text{ L/min}$ at pressure $P_1 = 100\text{ kPa}$. Using the orifice relation $q \propto \sqrt{P}$, if operating pressure is increased to $P_2 = 400\text{ kPa}$ ($\sqrt{400/100} = 2.0$), the new discharge $q_2$ in L/min is:

Answer Key:

2.4

Step-by-Step Solution & Explanation

$q_2 = 1.2 \times \sqrt{400/100} = 1.2 \times 2.0 = 2.4\text{ L/min}$.
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