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1.

An ideal transition curve is

Answer» IRC recommends Spiral or clothoid as the ideal transition curve due to following reasons: 1. It satisfies that rate of change of centrifugal acceleration is constant i.e., Ls.R = constant. Where Ls = length of transition curve R = radius of curve. 2. The calculation and field implementation of spiral curve is simple and easy. 3. It enhances aesthetics also.
2.

The slope correction for a 3° slope for a length of 100 m, is

Answer» Slope correction = -L(1-cos α). Where L Slope Distance, α Slope angle (Slope correction is always negative). = -100(1-cos 3°) = -0.137
3.

The orthogonal projection of the perspective centre on a tilted photograph, is called

Answer»

 PRINCIPAL POINT

4.

The most convenient co-ordinate system for specifying the relative positions of heavenly bodies on the celestial sphere, is

Answer»

 DECLINATION and RIGHT ASCENSION SYSTEM

5.

If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a levelThe correct answer is

Answer»

 both (i) and (IV)

6.

In triangulation surveys

Answer»

 All the above

7.

Polaris is usually observed for the determination of the azimuth when it is

Answer»

 At ELONGATION

8.

The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is

Answer»

 f/H SEC ¸