GATE CE 2026 Set 2 — Question 26

MCQ+1 / -0.33EasyLevellingGeomatics EngineeringGeodetic SurveyingPrinciples of Surveying

Geomatics Engineering → Levelling → Geodetic Surveying

Last updated 5 September 2026

Question

Which one of the following statements is TRUE with respect to levelling survey?

Correct answer (A) A level surface at all points is normal to the direction of the force of gravity. Solution In surveying: Statement (A) is TRUE : A level surface is a curved surface which is at every point perpendicular (normal) to the direction of gravity (plumb line) at that point. Statement (B) is FALSE: Level surfaces are equipotential surfaces and they are parallel to each other; they cannot cross. Statement (C) is FALSE: An ellipsoid is a mathematically defined regular surface used as a reference for coordinates. Statement (D) is FALSE: The geoid is an irregular equipotential surface of the Earth's gravity field that best fits mean sea level. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (A) A level surface at all points is normal to the direction of the force of gravity. Solution In surveying: Statement (A) is TRUE : A level surface is a curved surface which is at every point perpendicular (normal) to the direction of gravity (plumb line) at that point. Statement (B) is FALSE: Level surfaces are equipotential surfaces and they are parallel to each other; they cannot cross. Statement (C) is FALSE: An ellipsoid is a mathematically defined regular surface used as a reference for coordinates. Statement (D) is FALSE: The geoid is an irregular equipotential surface of the Earth's gravity field that best fits mean sea level.

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