Q.1
A sprayer having 0.4 litre per minute nozzle discharge rate andcm width of coverage, is required to apply 0.8 kg of active ingredient per hectare. If one kg of active ingredient is contained inlitres of spray solution, determine the speed of the sprayer.
  • a) 4 km/h
  • b) 3 km/h
  • c) 5 km/h
  • d) 6 km/h
Q.2
An air blast of sprayer is to be operated at 3 km/h and application rate isl/tree. The spacing is 9m*and each nozzle delivers 5 lit/min and operating process of 4*N/mIf one half row is sprayed from each side of the machine. How many sprayers will be needed?
  • a) 30
  • b) 50
  • c) 20
  • d) 40
Q.3
During a discharge measured through a hydraulic spray nozzle was 450*10-6m3/min at nozzle operating pressure ofkPa. If the pressure is increased by 10%. The percent increase in discharge will be _______
  • a) 4.9%
  • b) 5.1%
  • c) 3.6%
  • d) 6.4%
Q.4
A sprayer having 0.4 L/min nozzle discharge rate andcm width of coverage is required to apply 0.8 kg of active ingredient per hectare. If 1 kg of active ingredient is content inL of spray solution. What will be the speed of travel of sprayer?
  • a) 2 km/h
  • b) 5 km/h
  • c) 3 km/h
  • d) 4 km/h
Q.5
A hydraulic sprayer fitted with hollow cone nozzle is required to be calibrated for application ratel/ha. The sprayer speed is 6.5/h, nozzle spacing iscm, and the available 0.mm orifice diameter nozzle is rated at 0.l/min. What will be the nozzle flow rate?
  • a) 0.0135 l/s
  • b) 0.0136 l/s
  • c) 0.0137 l/s
  • d) 0.0138 l/s
Q.6
A field sprayer having a horizontal boom withnozzles spacedcm apart is to be designed for maximum application rate ofl/ha at nozzle pressure of kPa and forward speed of km/h. What will be the pump capacity in l/min?
  • a) 44
  • b) 46
  • c) 48
  • d) 50
Q.7
During a test, discharge measured through a hydraulic spray nozzle was 45010-6 m3/min at nozzle operating pressure ofkPa. If the pressure is increased by 10%, the percent increase in discharge will be ________
  • a) 2.82%
  • b) 3.87%
  • c) 4.87%
  • d) 5.87%
Q.8
An air blast of sprayers is to be operated at 3 km/hour and desired application rate isl/tree. The tree spacing is 9*9 m and nozzle delivers 5 l/min at operating pressure of 4*N/mHow many nozzles would be needed?
  • a) 10
  • b) 20
  • c) 30
  • d) 40
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