Mine Surveying - Study Mode
[#231] The accuracy of ordinary levelling for subsidance measurement is . . . . . . . .
Correct Answer
(B) 2 cm/km
[#232] The main purpose of land surveying is to . . . . . . . .
Correct Answer
(D) Mark the shape and extent of a portion of earths surface
[#233] It is the smallest value that can red from the instrument called . . . . . . . .
Correct Answer
(C) Least count
[#234] The sum of included angles of closed traverse ABCDEFGA is . . . . . . . .
Correct Answer
(A) 1080°
Explanation
Solution: The sum of the included angles of a closed traverse can be calculated using the formula: Sum of included angles = (n - 2) × 180° where n is the number of sides of the traverse. For a closed traverse ABCDEFGA, there are 7 sides (n = 7). Therefore, the sum of the included angles is: (7 - 2) × 180° = 5 × 180° = 900° + 180° = 1080° . Thus, Sum of included angles = 1080° .
[#235] The purpose of the reflecting mirror is prismatic compass to observe the
Correct Answer
(B) Objects which are too low or too high