🔍 Key Concepts

• Gear pump types – straight (simple) gear vs helical gear teeth • Effect of tooth shape on pulsation and smoothness of flow • How discharge pressure and flow behave in positive-displacement pumps

💭 Think About

• Think about how the meshing of straight teeth compares to slanted (helical) teeth as the gears rotate. What does that do to the pulsations in flow? • Which option describes something directly affected by how evenly the fluid is pushed through the pump during each rotation? • Ask yourself: does the tooth shape by itself greatly change distance, time of operation, or speed control – or mainly how the fluid comes out of the discharge?

✅ Before You Answer

• Compare how flow pulsation differs between straight-tooth and helical-tooth gear pumps • Decide which choice is most directly tied to reducing pressure/flow surges rather than general pump endurance or piping length • Eliminate any options that describe things usually controlled by system design (motor, piping, duty cycle) rather than just gear tooth geometry