🔍 Key Concepts

• Relationship between flow area and how much fluid can pass through a component • How spray pattern and fineness are affected by pressure, area, and velocity • Function of an atomizer’s tangential slots and orifice in forming the spray

💭 Think About

• Ask yourself: If I change the ratio of the slot area to the orifice area, what changes first – the amount of fuel I can pass, how finely it breaks up, or the overall spray shape? • Think about which option is most directly controlled by cross-sectional area ratios rather than by pressure or fuel properties. • Consider what the tangential slots actually do to the fuel before it exits the orifice – does that mainly affect quantity, spray shape, or droplet size?

✅ Before You Answer

• Match each choice to either flow rate, spray pattern/shape, or droplet fineness, then link those to area ratio. • Recall that tangential slots impart a swirling motion – decide which of the answer choices that swirling action is most closely related to. • Verify which of the listed effects would be most sensitive to a designed geometric ratio rather than operating conditions like pump pressure.