Which of the following sets lists items that are part of the turbine drive train's main components?

• A. Hub adapter, Shrink disk, Main bearings, Inductive sensors
• B. Gearbox, Generator, Main shaft, Main bearings
• C. Slip ring, PT 100, Foam, Inductive sensors
• D. Gearbox, Generator, Hub adapter, Shrink disk

Answer: (B)

The key idea is identifying the parts that actually carry and convert the turbine’s mechanical power into electricity. The drive train’s main components are the parts that form the power path: the main shaft carries the turbine’s rotational energy, the main bearings support and align that shaft, the gearbox adjusts speed and torque to suitable levels, and the generator converts the mechanical energy into electrical energy. Together these four handle the core function of delivering output power. Other items shown are not part of the main power path: hub adapters and shrink disks are mounting or coupling parts, inductive sensors and PT100 are measurement devices, and foam is insulation/material. The combination of gearbox, generator, main shaft, and main bearings represents the primary drive train, which is why that choice is correct.