Survey (101-120)

Updated: Apr 24, 2020

101.

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

bubble.

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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