Which component connects the pump shaft to the motor shaft?

Which component connects the pump shaft to the motor shaft?

• A. gear train
• B. couplings
• C. bearings
• D. shaft sleeve

Answer: (B)

The main idea here is how two rotating shafts are linked so they can transfer motion and power without forcing exact alignment. A coupling is the device designed to join the pump shaft and the motor shaft and transmit torque between them while accommodating small misalignments and absorbing some vibration. That makes it the best answer because it’s purpose-built to connect two shafts and keep them working as a single drive system. Think of the other options: a gear train changes speed and torque between shafts, not just connecting them; bearings support and align shafts but don’t link them together; a shaft sleeve serves as wear protection or an adaptor around a shaft and doesn’t connect two separate shafts.

The main idea here is how two rotating shafts are linked so they can transfer motion and power without forcing exact alignment. A coupling is the device designed to join the pump shaft and the motor shaft and transmit torque between them while accommodating small misalignments and absorbing some vibration. That makes it the best answer because it’s purpose-built to connect two shafts and keep them working as a single drive system.

Think of the other options: a gear train changes speed and torque between shafts, not just connecting them; bearings support and align shafts but don’t link them together; a shaft sleeve serves as wear protection or an adaptor around a shaft and doesn’t connect two separate shafts.