Landscape Survey Maths: Level-Book Elevations and Closure

Landscape Survey Maths: Level-Book Elevations and Closure

Original quantitative topic practice in English. All 24 questions are included in a shuffled order. Each question supplies its own data and model assumptions; use only those assumptions. Choose one answer. Practice target: 20/24, not an official examination pass mark. Keep full intermediate precision. These exercises cover the calculation scope in the title; they do not constitute a full Red Seal examination, trade qualification, site design or operating specification.
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Use a simplified levelling exercise. A benchmark elevation is 130 m; backsight 1.7 m establishes instrument height. Foresights to points P and Q are 2.1 and 2.45 m. A check foresight to a second benchmark is 1.4 m; its known elevation is 130.295 m. Elevation = instrument height − staff reading. Signed closure error = computed check elevation − known elevation. No construction-grade specification is implied. Calculate the elevation of Q in metres. Keep intermediate values unrounded; round the final answer to 4 decimal places if needed.