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Survey Calculations & Coordinate Systems Flashcards

7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. How long is one Gunter's chain?

    Answer: 66 ft

    A Gunter's chain is 66 ft (4 rods, 100 links), and 10 square chains make one acre.

  2. In differential leveling, BM elevation = 100.00 ft, backsight = 5.25 ft and foresight = 3.10 ft. What is the elevation of the turning point?

    Answer: 102.15 ft

    HI = 100.00 + 5.25 = 105.25, and elevation = 105.25 − 3.10 = 102.15 ft.

  3. What is 45.5° in degrees-minutes-seconds?

    Answer: 45°30'00"

    0.5° × 60 = 30', so 45.5° = 45°30'00".

  4. What is the back azimuth of a line with an azimuth of 110°?

    Answer: 290°

    Back azimuth = azimuth ± 180°, so 110° + 180° = 290°.

  5. Line AB has an azimuth of 40°. At B, the deflection angle to C is 25° right. What is the azimuth of BC?

    Answer: 65°

    A right deflection is added to the forward azimuth: 40° + 25° = 65°.

  6. About how large is the combined curvature and refraction correction over a sight distance of 1 mile?

    Answer: 0.57 ft

    Combined correction h ≈ 0.574 K² ft (K in miles), which is about 0.57 ft at 1 mile.

  7. How many U.S. survey feet are in one meter?

    Answer: 3.280833

    The U.S. survey foot is defined as 1200/3937 m, so 1 m = 3937/1200 = 3.280833 U.S. survey ft (the international foot gives 3.280840).