The three basic parts of any eductor are the nozzle, the suction chamber, and the __________.

Correct Answer: Option D — diffuser

An eductor operates on the Venturi principle. The motive fluid passes through a nozzle, creating a low-pressure area in the suction chamber that draws in the secondary fluid. The mixture then enters the diffuser, where velocity energy is converted back into pressure energy to discharge the fluid against the system head.