Which of the following errors can be eliminated by taking mean of bot face observations ?

Related Mcqs:

Cross staff is an instrument used for________________?

A. measuring approximate horizontal angles B. setting out right angles C. measuring bearings of the lines D. none of the above...

If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated____________?

A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate … If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated____________?Read More...

The rise and fall method_______________?

A. is less.accurate than height of instrument method B. is not suitable for levelling with tilting levels C. provides a check on the reduction of intermediate point levels D. quicker and less tedious for large number of intermediate sights...

Select the correct statement_______________?

A. A contour is not necessarily a closed curve B. A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour C. Two contours of different elevations do not cross each other except in case of an overhanging cliff D. All of the above statements are … Select the correct statement_______________?Read More...

Select the correct statement?

A. Contour interval on any map is kept constant B. Direct method of contouring is cheap¬er than indirect method C. Inter-visibility of points on a contour map cannot be ascertained D. Slope of a hill cannot be determined with the help of contours...