ESE 2021 Technical Quiz :Tacheometric Surveying

Anallactic Lens

(i) is a double convex lens provided between objective and eye-piece.

(ii) Makes the additive constant equal to zero.

(iii) Reduce the brightness of object

(iv) Makes multiplying constant equal to 100

Consider the following statements:

Statement 1: In fixed hair stadia method, the staff intercept will always remain constant irrespective of distance.

Statement 2: Distance between cross hairs always remain constant in fixed hair stadia method.

The focal length of a telescope is found to be 0.25 m and the stadia interval of the tacheometer is 2 mm. The stadia interval factor will be

Match List 1 with List 2 and select the answer using the code below

List 1

(i) Zenith

(ii) Equator

(iii) Nadir

(iv) Latitude

List 2

(a) Angular distance of a place north or south of the equator

(b) The point on the celestial sphere just above the observer

(c) The great circle, the plane of which is perpendicular to axis of rotation

(d) The point on the celestial sphere just below the observer

The difference in longitude of a place and standard meridian is 20˚15’30”. What will be the time difference between these places?