Which statement best describes a brass coupling?

Which statement best describes a brass coupling?

• A. It serves as a seal to prevent leakage in the pump
• B. It dampens electrical noise in the motor circuit
• C. It transmits power via a belt to the pump
• D. It connects the shafts of the motor and the circulator pump

Answer: (D)

A coupling’s job is to join the motor shaft to the pump shaft so the motor can transmit torque to the pump. A brass coupling provides a solid mechanical link between the two shafts, allowing a drive connection while accommodating small misalignments and end play. Brass is used for its strength and corrosion resistance, and the design typically clamps or uses set screws to hold the shafts together. It isn’t a seal for leakage—that role belongs to gaskets or packing. It doesn’t damp electrical noise in the motor circuit—that function comes from electrical components like filters or snubbers. It also isn’t a belt drive component—belt drives use pulleys and belts to transfer power. So, the brass coupling’s purpose is to connect the shafts of the motor and the circulator pump.

A coupling’s job is to join the motor shaft to the pump shaft so the motor can transmit torque to the pump. A brass coupling provides a solid mechanical link between the two shafts, allowing a drive connection while accommodating small misalignments and end play. Brass is used for its strength and corrosion resistance, and the design typically clamps or uses set screws to hold the shafts together. It isn’t a seal for leakage—that role belongs to gaskets or packing. It doesn’t damp electrical noise in the motor circuit—that function comes from electrical components like filters or snubbers. It also isn’t a belt drive component—belt drives use pulleys and belts to transfer power. So, the brass coupling’s purpose is to connect the shafts of the motor and the circulator pump.