| Grid lines are parallel to |
A) magnetic meridian of the central point of the grid
B) line representing the central true meridian of the grid
C) geographical equator
D) none of these
| Profile levelling is usually done for determining |
A) contours of an area
B) capacity of a reservoir
C) elevations along a straight line
D) boundaries of property
| Greater accuracy in linear measurements, is obtained by |
A) tacheometry
B) direct chaining
C) direct taping
D) all the above
| The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called |
A) brightness of telescope
B) magnification of telescope
C) resolving power of telescope
D) none of these
| The apparent error on reversal is |
A) equal to the actual error
B) twice the actual error
C) thrice the actual error
D) none of these
| For preparation of a contour plan for a route survey |
A) method of squares is used
B) method of trace contour is used
C) method of cross profile is used
D) indirect method of contouring is used
| The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is |
A) reciprocal levelling
B) precise levelling
C) differential levelling
D) flying levelling
| Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to |
A) shift
B) twice the shift
C) thrice the shift
D) four times the shift
| The power of a lens |
A) is reciprocal of its focal length
B) is positive if it is a convex lens
C) is negative if it is a concave lens
D) is measured in diopter
| Perpendicularity of an offset may be judged by eye, if the length of the offset is |
A) 5 m
B) 10 m
C) 15 m
D) 20 m
