If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is ____ ?
A. 100.655m
B. 01.870m
C. 99.345 m
D. 100.345 m
contour
Contour interval is ____ ?
A. larger for accurate works
B. larger if the time available is more
C. inversely proportional to the scale of the map
D. directly proportional to the flatness of ground
A series of closely spaced contour lines represents a _____ ?
A. uniform slope
B. plane surface
C. gentle slope
D. steep slope
In direct method of contouring, the process of locating or identifying points lying on a contour is called _____ ?
A. centring
B. centring
C. vertical control
D. ranging