Civil Engineering MCQAE Level Civil Engineering
For inclined stadia tacheometry with vertical staff, the horizontal distance D between instrument and staff is:
SurveyingStadia Tacheometry FormulaMEDIUM
Choose the correct answer
A
D = K x s + C (horizontal only)
B
D = K x s x cos2(theta) + C x cos(theta)
C
D = K x s x sin(theta)
D
D = K x s / cos(theta)
Correct Answer
B. D = K x s x cos2(theta) + C x cos(theta)
Why is this the answer?
Tacheometry formulas (inclined sight, vertical staff): Horizontal distance D = Ks cos2(theta) + C cos(theta); Vertical intercept V = (Ks/2) sin(2theta) + C sin(theta). Where K = stadia multiplier (usually 100), s = staff intercept, C = additive constant (usually 0 for modern telescopes), theta = angle of inclination.
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