Question: Insecticide used to be distributed with a spray gun as shown in figure (a). To activate the spray atomiser, a plunger is pushed inwards which

Insecticide used to be distributed with a spray gun as shown in figure (a). To activate the spray atomiser, a plunger is pushed inwards which generates a high pressure at location 1. The air then flows through a contraction, to location 2 which results in the insecticide being drawn up from the reservoir. The insecticide becomes suspended in the air which then exits the nozzle as a fine spray (location 4).

VN Contraction Nozzle UNIVER Reservoir SPRAY Plunger (a) di d2 AF 13 hPa 5L Reservoir (6)

Nozzle Reservoir F. A L 16 Salam UNIVER SPRAY (a) d Contraction

Nozzle Reservoir F. A L 16 Salam UNIVER SPRAY (a) d Contraction Pa U (b) 5 UNIVER Prote d h 3 Reservoir Plunger

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a To determine the pressure at location 1 we can use the Bernoullis equation In this case the height ... View full answer

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