What are the 3 types of frame mounted pumps?

• A. Gear, rope and pulley
• B. Chain, belt and coupling
• C. Shaft, bearing and seal
• D. Plate, bracket and housing

Answer: (B)

Frame-mounted pumps are driven from an external power source using one of three common drive arrangements to transfer rotation from the motor to the pump. The three types are chain drive, belt drive, and direct coupling.

Chain drive uses a chain wrapped around sprockets on both the motor and the pump shafts. It’s sturdy, can handle misalignment better over longer distances, and can transmit substantial torque.

Belt drive uses a belt around pulleys on the motor and pump shafts. It provides some flexibility in alignment and can absorb shocks, with the added ability to change speed ratios by selecting different pulley sizes.

Coupling means a direct connection between the motor shaft and the pump shaft, whether rigid or flexible. This creates a compact system with minimal components and no belt or chain, but requires precise alignment.

The other options refer to internal components or frame parts rather than drive methods, so they don’t describe how frame-mounted pumps are powered.