Test: Tacheometric, Curve & Hydrographic Surveying - 1 - Civil Engineering (CE) MCQ

If L is the length of transition curve and R is the radius of circular curve, then the shift of the curve is directly proportional to

For a simple circular curve, which one of the following gives the correct relation between the radius, R and degree of curve D, for 20 m arc length?

Which of the following elements of a simple curve are correctly matched?
1. Tangent length ..... R tan Δ/2
2. Apex distance .... 2R sin Δ/2
3. Length of long chord.... 2 R cosec Δ/2
4. Mid-ordinate .... R ver sin Δ/2
(R is the radius and Δ is the deflection angle)

Select the correct answer using the codes given below:

If a tacheometer is fitted with an anallatic lens

If Δ is the angle of deflection of the curve, T₁ and T₂ are its points of tangencies, the angle between the tangent at T₁ and long chord T₁ T₂ will be

If R is the radius of the main curve, θ the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is

If the intercept on a vertical staff is observed as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is