Surveying

1 Surveying scales is largest - small paper to ground ratio.


2 Geodetic surveying is different from plane surveying because of-the curvature of the earth.


3 The error due to bad ranging-cumulative; positive.


4 Offsets' are-short measurements from chain line.


5 used for base line measurements-invar tape.


6 An invar tape is made of an alloy of-nickel and steel.


7 Number of links in a 30 m metric chain is-150.


8 Ranging' is the process of-aligning the chain in a straight line

between two extremities.


9 working from whole to part' is used in surveying because-accumulation of errors is prevented.


10 A metallic tape is made of-cloth and wires.


11 For a well-conditioned triangle, no angle should be less than-30.


12 The position of a point can be fixed more accurately by-perpendicular offsets.


13 The main object of running a tie line is-to take details of nearby objects.


14 an obstacle to chaining but not to ranging-river.


15 A building is an obstacle to-both chaining and ranging.


16 The angle of intersection of the two plane mirrors of an optical square is-45.


17 angles can be set out with the help of French cross staff-either 45° or 90°.


18 method of perpendicular offsets-involves less measurement on the ground.


19 The permissible error in chaining for measurement with chain on rough or hilly ground is -1 in 250.


20 The correction for sag is-always subtractive.


21 Cross staff is an instrument used for-setting out right angles.


22 Normal tension is that pull which-neutralizes the effect due to pull and sag


23 not used in measuring perpendicular offsets-line ranger.


24 If the length of a chain is found to be short on testing-it can be adjusted by-straightening the links.


25 The maximum tolerance in a 20 m chain is-±5 mm.


26 The length of a chain is measured from-outside of one handle to outside of

other handle.


27 In the prismatic compass-the magnetic needle and graduated circle do not move with the box.


28 The horizontal angle between the true meridian and magnetic meridian at a place is called-declination.


29 A negative declination shows that the magnetic meridian is to the-western side of the true meridian.


30 Agate cap is fitted with a-prismatic compass.


31 Theodolite is an instrument used for-measurement of both horizontal and

vertical angles.


32 Size of a theodolite is specified by-the diameter of lower plate.


33 A telescope is said to be inverted if its-vertical circle is to its right and the

bubble of the telescope is down.


34 The following sights are taken on a "turning point"-foresight and backsight.


35 In an internal focussing type of telescope, the lens provided is-concave.


36 Height of instrument method of levelling is-quicker and less tedious for large

number of intermediate sights.


37 The difference between a level line and a horizontal line is that- level line is a curved line while horizontal line is a straight line.


38 With the rise of temperature, the sensitivity of a bubble tube-decreases.


39 Sensitiveness of a level tube is designated by-radius of level tube.


40 Contour interval is-inversely proportional to the scale of the map.


41 The suitable contour interval for a map with scale 1 : 10000 is-2m.


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


43 Direct method of contouring is-most accurate method.


44 Closed contours, with higher value inwards, represent a-hillock.


45 Contour interval is-the vertical distance between two consecutive contours.


46 Benchmark is established by-spirit levelling.


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


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


49 Detailed plotting is generally done by-radiation.


50 The size of a plane table is-600 mm x 750 mm.


51 The instrument used for accurate centering in plane table survey is- plumbing fork.


52 The two point problem and three point problem are methods of-resection and orientation.


53 The resection by two point problem as compared to three point problem-requires more labour.


54 The methods used for locating the plane table stations are traversing,resection.


55 Bowditch rule is applied to-a closed traverse for adjustment of closing error 56 Subtense bar is an instrument used for-measurement of horizontal distances in plane areas.


57 Overturning of vehicles on a curve can be avoided by using-transition curve.


58 Different grades are joined together by a-vertical curve.


59 Total angle of deflection of a transition curve is-spiral angle /3.


60 The shape of the vertical curve generally provided is-parabolic.


61 Agonic line is the line joining points having-zero declination.


62 Parallax bar is used to measure-parallax difference.

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