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1 vote	1202 views	1 answer	The theodolites used for making tacheometric observations by optical wedge system, are updated 11 years ago by Civil Engineer
1 vote	1599 views	2 answers	Straight, parallel and widely spaced contours represent updated 11 years ago by Civil Engineer
1 vote	1419 views	1 answer	While setting a plane table at a station it was found that the error in centering was 30 cm away from the ray of length 40 m drawn from the station. If the scale of the plan is 1 cm = 2 cm, the displacement of the end of the ray in plan from the true position will be updated 11 years ago by Civil Engineer
1 vote	1386 views	1 answer	A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic updated 11 years ago by Civil Engineer
1 vote	1223 views	2 answers	If the whole circle bearing of a line is 270°, its reduced bearing is updated 11 years ago by Civil Engineer
1 vote	1246 views	2 answers	For taking offsets with an optical square on the right hand side of the chain line, it is held updated 11 years ago by Civil Engineer
1 vote	1866 views	2 answers	A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m and 284.295 m respectively, the collimation error per 100 m is updated 11 years ago by Civil Engineer
1 vote	1279 views	1 answer	If the declination of the needle is 10° W updated 11 years ago by Civil Engineer
1 vote	1388 views	1 answer	The method generally preferred to for contouring an undulating area, is updated 11 years ago by Civil Engineer
1 vote	1514 views	1 answer	Number of links per metre length of a chain are updated 11 years ago by Civil Engineer