What does the term "Pressure Casing" refer to in relation to a pump?

• A. Only the rotating parts of the pump
• B. All stationary pressure-containing parts
• C. The assembly where fluids enter and exit
• D. Only the nozzles and seals

Answer: (B)

The term "Pressure Casing" in relation to a pump specifically refers to all stationary pressure-containing parts. This includes essential components such as the casing itself, which houses the impeller and holds fluid at the required pressure, as well as other integral parts that ensure the structural integrity of the pump under operating conditions.

The pressure casing is critical for maintaining the necessary pressure levels within the system, allowing the pump to perform its function effectively. It prevents fluid leakage, supports the hydraulic forces acting on internal components, and protects the interior mechanics from external environmental factors. Understanding the role of the pressure casing is vital for assessing pump design and operation, making it a key concept in rotating equipment certification.