GATE AG 2012 • Q7 MCQ • 2 Marks

Section 4: Soil and Water Conservation Engineering

Surveying and Levelling

Subtopic: Measurement of angles and bearings

Question Statement:

The difference between Fore Bearing and Back Bearing of a traverse line is:

Options:

  • (A) exactly 90°
  • (B) less than 180°
  • (C) exactly 180°
  • (D) greater than 180°

Official Answer Key:

C

Step-by-Step Solution & Explanation

By definition, Back Bearing = Fore Bearing ± 180° (using whole-circle bearing system), so their difference is always exactly 180°. Answer: C.

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