Which component is an example of a static seal?

Which component is an example of a static seal?

• A. Packing
• B. Lip seal
• C. Gasket
• D. V-Ring

Answer: (C)

This question tests understanding of static versus dynamic seals. A static seal is one where the mating surfaces stay still relative to each other, so the seal is created by compressing a material between those surfaces without any sliding contact. A gasket fits that role perfectly: it sits between stationary surfaces, like flanged joints, and is crushed to form a seal. There’s no moving surface rubbing against the gasket during operation, so it remains a static seal. The other options rely on moving parts to maintain the seal. Packing seals around a shaft involve sliding contact as the shaft moves, making them dynamic. Lip seals rely on a flexible lip that maintains contact with a moving shaft, also dynamic. V-rings seal around a rotating or moving shaft and depend on friction and deflection, which is characteristic of dynamic sealing. So the gasket is the example of a static seal.

This question tests understanding of static versus dynamic seals. A static seal is one where the mating surfaces stay still relative to each other, so the seal is created by compressing a material between those surfaces without any sliding contact.

A gasket fits that role perfectly: it sits between stationary surfaces, like flanged joints, and is crushed to form a seal. There’s no moving surface rubbing against the gasket during operation, so it remains a static seal.

The other options rely on moving parts to maintain the seal. Packing seals around a shaft involve sliding contact as the shaft moves, making them dynamic. Lip seals rely on a flexible lip that maintains contact with a moving shaft, also dynamic. V-rings seal around a rotating or moving shaft and depend on friction and deflection, which is characteristic of dynamic sealing.

So the gasket is the example of a static seal.