What is the minimum accuracy class/order for all level work?

What is the minimum accuracy class/order for all level work?

• A. First Order Class I
• B. Second Order Class II
• C. Third Order Class III
• D. Second Order Class I

Answer: (C)

In leveling, accuracy orders define how tight the allowable errors must be in the vertical control you establish. For routine level work, you don’t need the extremely stringent tolerances of the highest orders, which are reserved for geodetic networks and critical projects requiring the smallest possible height discrepancies. Third Order Class III represents the baseline level of precision that is deemed acceptable for all standard leveling tasks, providing reliable elevations without the extra cost and effort of higher orders. If a project demands tighter vertical control, you would upgrade to a higher order; if it’s just general leveling for typical construction or topography, Third Order Class III is sufficient. Therefore, the minimum accuracy class/order for all level work is Third Order Class III.