Mine Surveying - Study Mode
[#121] The surface which is parallel to mean surface of earth called . . . . . . . .
Correct Answer
(C) Level surface
[#122] A back sight on a bench mark of RL 100m on the floor of tunnel is 3.25m. The inverse staff reading on a roof station of the tunnel is 1.25m. The RL of the roof station is . . . . . . . .
Correct Answer
(B) 104 - 105
[#123] A concave lens provided in telescope between the object lens and eye piece to eliminate the additive constant (f + d) from the Tachernetric distance equation is known as an . . . . . . . . lens.
Correct Answer
(D) Annallatic
[#124] The BB of line AB is 195° and the angle BAC is 150° measured in clockwise direction. The BB of line AC is . . . . . . . .
Correct Answer
(D) 165°
[#125] ABCDA is a closed traverse and the bearings of lines are . . . . . . . . AB = 124° 30', BC = 68° 15', CD = 310° 30', DA = 200° 15'. The sum of the interial angles is . . . . . . . .
Correct Answer
(D) 360°