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 contourC. Two contours of different elevations do…

Dumpy level is most suitable when______________? A. the instrument is to be shifted frequently B. fly levelling is being done over long distanceC. many readings are to be taken from a single setting of the instrument D. all of the…

Contour interval is_______________? A. inversely proportional to the scale of the map B. directly proportional to the flatness of ground C. larger for accurate works D. larger if the time available is more