🔍 Key Concepts

• Compare the internal parts in the illustration with typical components of a fuel injection pump, a governor, a cylinder lubricator, and a centrifugal pump. • Note the presence or absence of flyweights, cam-driven plunger, and multiple outlet lines for lubrication. • Look at the bottom of the unit for how it is driven (cam, shaft, or impeller) and how the output flow would be controlled.

💭 Think About

• Which of the four choices would normally be driven directly by a cam acting on a vertically moving plunger with a strong return spring? • Do you see any rotating flyweights or linkage that would sense engine speed, as used in a governor? • If this were a lubricator or cooling pump, how many outlets would you expect, and would the design need a precise plunger-and-barrel arrangement like the one shown?

✅ Before You Answer

• Identify whether the central moving element is a plunger in a barrel or an impeller/gear type rotor. • Check for the presence of flyweights or speed-sensing parts – critical for a governor. • Look for multiple small discharge points (typical of cylinder lubricators) versus a single high‑pressure outlet typical of an injection-type device.