The bench mark is described as what kind of marker?

The bench mark is described as what kind of marker?

• A. A permanent brass plate
• B. A wooden stake
• C. A metal rod set flush with the ground
• D. A painted iron disk

Answer: (A)

A benchmark in surveying is a permanent reference marker that provides a known elevation for measurements. It must be durable and clearly identifiable so it remains usable for many years. A permanent brass plate fits this description because it is designed to be fixed in place, resisting weather and wear, and clearly marks the reference point for elevations. The other options describe markers that are temporary or less reliable as fixed references: a wooden stake can rot or shift; a metal rod set flush with the ground can be disturbed or buried; a painted iron disk can wear away and lose visibility. Therefore, the permanent brass plate is the best choice.

A benchmark in surveying is a permanent reference marker that provides a known elevation for measurements. It must be durable and clearly identifiable so it remains usable for many years. A permanent brass plate fits this description because it is designed to be fixed in place, resisting weather and wear, and clearly marks the reference point for elevations. The other options describe markers that are temporary or less reliable as fixed references: a wooden stake can rot or shift; a metal rod set flush with the ground can be disturbed or buried; a painted iron disk can wear away and lose visibility. Therefore, the permanent brass plate is the best choice.