Mine Surveying - Study Mode
[#226] An example of natural error in prismatic compass survey is . . . . . . . .
Correct Answer
(D) Variation in declination
[#227] In a topographical survey we determine . . . . . . . .
Correct Answer
(B) Boundaries of fields
[#228] Determine the airplane flying height to obtain the average scale of the photograph equal 1/5000. Ground surface elevations vary from 150 to 300m. Focal length of the camera lens is 150 mm.
Correct Answer
(B) 975
[#229] The bearing of a line AB is 283° 15' and the bearing of another line AC is 5° 45', the included angle is . . . . . . . .
Correct Answer
(C) 82° 30'
[#230] When the presmatic compass is transported from one station to another the object vane is folded on the glass cover in order to . . . . . . . .
Correct Answer
(B) Avoid the undue wear of the pivot