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Survey (101-120)

Updated: Apr 24, 2020


a) In levelling, a station is the point where the levelling staff is held and

not where level is set up.

b) The inner surface of a bubble tube is an arc of a circle.

c) Sensitiveness of a level tube can be increased by the increase in length of



102. The distance to the visible horizon from a height of 36 m above mean sea level is given by


103. Dumpy level is most suitable when

many readings are to be taken from a single setting of the instrument


104. The difference of levels between two stations A and B is to be determined.For

best results, the instrument station should be

equidistant from A and B


105. Contour interval is inversely proportional to the scale of the map


106. An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as

contour gradient


107. The suitable contour interval for a map with scale 1 : 10000 is

2 m


108 Two contours of different elevations do not cross each other except in case

of an overhanging cliff.


109. A series of closely spaced contour lines represents a steep slope


110. Direct method of contouring is most accurate method


111. In direct method of contouring, the process of locating or identifying points lying on a contour is called vertical control


112. In the cross-section method of indirect contouring, the spacing of cross-sections depends upon

contour interval, scale of plan, characteristics of ground


113. Which of the following methods of contouring is most suitable for a hilly terrain ? tacheometric method


114.Contour interval on any map is kept constant


115. Closed contours, with higher value inwards, represent a hillock


116. Contour interval is the vertical distance between two consecutive contours


117. Benchmark is established by spirit levelling


118. The type of surveying which requires least office work is plane table surveying


119. Intersection method of detailed plotting is most suitable for hilly areas


120. Detailed plotting is generally done by radiation


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