Question

In a distributed power supply, how is the bus powered?

Answer

C — By several devices on the line, each containing a Decentralized Power Supply Unit (DPSU) with an integrated choke module

Correct: The source describes the bus being powered by devices each containing a DPSU with an integrated choke module.

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All proposed choices (exam context)

A.By connecting the 230 V mains directly to the bus
B.By batteries fitted inside every bus device
C.By several devices on the line, each containing a Decentralized Power Supply Unit (DPSU) with an integrated choke module✓
D.By a single large centralized PSU only

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