A. the instrument is to be shifted frequently
B. fly levelling is being done over long distance
C. many readings are to be taken from a single setting of the instrument
D. all of the above
Related Mcqs:
- If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be_______________?
A. true R.L
B. more than true R.L
C. less than true R.L
D. none of the above - The suitable contour interval for a map with scale 1 : 10000 is______________?
A. 2 m
B. 5m
C. 10 m
D. 20 m - Which of the following methods of con-touring is most suitable for a hilly terrain ?
A. direct method
B. square method
C. cross-sections method
D. tacheometric method - Intersection method of detailed plotting is most suitable for________________?
A. forests
B. urban areas
C. hilly areas
D. plains - Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations ?
A. measuring angle and distance from one transit station
B. measuring angles to the point from at least two stations
C. measuring angle at one station and distance from other
D. measuring distance from two points on traverse line - A’level line’is a______________?
A. horizontal line
B. line parallel to the mean spheriodal surface of earth
C. line passing through the center of cross hairs and the center of eye piece
D. line passing through the objective lens and the eye-piece of a dumpy or tilting level - As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be________________?
A. 98.70
B. 100.00
C. 102.30
D. 103.30 - Which of the following errors can be neutralised by setting the level midway between the two stations ?
A. error due to curvature only
B. error due to refraction only
C. error due to both curvature and re-fraction
D. none of the above - The difference between a level line and a horizontal line is that_______________?
A. level line is a curved line while hori-zontal line is a straight line
B. level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
C. horizontal line is normal to plumb line while level line may not be normal to the plumb line
D. both are same - Sensitiveness of a level tube is designated by______________?
A. radius of level tube
B. length of level tube
C. length of bubble of level tube
D. none of the above
