When installing a mechanical shaft seal on a pump, it is important to ______.

Correct Answer: Option B — ensure that correct spring pressure is applied to the seating faces

Mechanical seals rely on precise spring pressure to maintain contact between the stationary and rotating faces. Improper spring tension leads to premature seal failure or excessive leakage. Technicians must verify that the seal is installed to the manufacturer's specified working length to ensure optimal face loading and fluid containment.