Class 4 (4th Engineer) MEKG 📅 Nov 2024

Exam Question

Which of the materials listed is used as the dynamic seal material on mechanical seals installed on most centrifugal pumps used in water service? (16)

(a) Copper.

(b) Copper and carbon.

(d) Bronze,

Briefly justify your answer.

Reference Answer

The correct answer is **(c) Carbon**.
### Justification for Material Selection in Mechanical Seals
To achieve full marks (16/16) in a written exam, a comprehensive understanding of mechanical seal materials and their application in centrifugal pumps for water service is required. The choice of carbon-graphite as a dynamic seal face material is based on a specific set of physical and chemical properties that make it uniquely suitable for this demanding application.
#### 1. Understanding Mechanical Seals

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