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The angle subtended by the long chord of a simple circular curve at its centre is equal to
The radial offset at a distance X from the point of commencement of curve of radius R is given by
The shape of the vertical curve generally provided is
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?
For 20 m arc R = 1145.9/D
for 30 m arc R = 1718.9/D
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. Midordinate .... 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, T_{1 }and T_{2} are its points of tangencies, the angle between the tangent at T_{1} and long chord T_{1} T_{2} 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
Because additive constant is zero and multiplying constant is 100 for a tacheometer
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