Question

question 94 of 100 · multiple choice

the rotating element of a mechanical seal is attached to?

a the pump casing

b the gland follower

c the shaft

d the impeller

Explanation:

Identify the function of a mechanical seal

A mechanical seal prevents fluid leakage along a rotating shaft. It consists of a stationary element and a rotating element.

Determine the mounting of the rotating element

The rotating element must rotate with the shaft to maintain a dynamic seal against the stationary element. Therefore, it is secured directly to the rotating shaft (or a shaft sleeve).

Evaluate the given options

• A (pump casing): Stationary housing.
• B (gland follower): Stationary component holding the stationary seal face.
• C (the shaft): Rotating component to which the rotating seal element is attached.
• D (the impeller): Mounted on the shaft, but the seal itself is secured directly to the shaft/sleeve.

Answer:

• (A) the pump casing
• (B) the gland follower
• (C) the shaft (Correct answer)
• (D) the impeller