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This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on Surveying Set 3

Q1 | Which of the following errors can be neutralised by setting the level midwaybetween the two stations ?
  • error due to curvature only
  • error due to refraction only
  • error due to both curvature and re-fraction
  • none of the above
Q2 | Height of instrument method of levelling is
  • more accurate than rise and fall method
  • less accurate than rise and fall method
  • quicker and less tedious for large number of intermediate sights
  • none of the above
Q3 | The rise and fall method
  • is less.accurate than height of instrument method
  • is not suitable for levelling with tilting levels
  • provides a check on the reduction of intermediate point levels
  • quicker and less tedious for large number of intermediate sights
Q4 | If the staff is not held vertical at a level┬Čling station, the reduced level calculatedfrom the observation would be
  • true R.L.
  • more than true R.L.
  • less than true R.L.
  • none of the above
Q5 | The difference between a level line and a horizontal line is that
  • level line is a curved line while hori-zontal line is a straight line
  • level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
  • horizontal line is normal to plumb line while level line may not be normal to the plumb line
  • both are same
Q6 | The sensitivity of a bubble tube can be increased by
  • increasing the diameter of the tube
  • decreasing the length of bubble
  • increasing the viscosity of liquid
  • decreasing the radius of curvature of tube
Q7 | With the rise of temperature, the sensitivity of a bubble tube
  • decreases
  • increases
  • remains unaffected
  • none of the above
Q8 | Refraction correction
  • completely eliminates curvature correction
  • partially eliminates curvature correction
  • adds to the curvature correction
  • has no effect on curvature correction
Q9 | The R.L, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is on the ceiling is 2.745 m, the R.L. of point B will be
  • 94.80 m
  • 99.71 m
  • 100.29 m
  • 105.20 m
Q10 | As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be
  • 98.7
  • 100
  • 102.3
  • 103.3
Q11 | If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to
  • d
  • 1/d
  • d2
  • 1/d2
Q12 | Sensitiveness of a level tube is designated by
  • radius of level tube
  • length of level tube
  • length of bubble of level tube
  • none of the above
Q13 | Which of the following statements is in-correct ?
  • Error due to refraction may not be completely eliminated by reciprocal levelling.
  • Tilting levels are commonly used for precision work.
  • The last reading of levelling is always a foresight.
  • All of the above statements are incorrect.
Q14 | Dumpy level is most suitable when
  • the instrument is to be shifted frequently
  • fly levelling is being done over long distance
  • many readings are to be taken from a single setting of the instrument
  • all of the above
Q15 | 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
  • closer to the higher station
  • closer to the lower station
  • as far as possible from the line AB
Q16 | Contour interval is
  • inversely proportional to the scale of the map
  • directly proportional to the flatness of ground
  • larger for accurate works
  • larger if the time available is more
Q17 | An imaginary line lying throughout the surface of ground and preserving aconstant inclination to the horizontal is known as
  • contour line
  • horizontal equivalent
  • contour interval
  • contour gradient
Q18 | The suitable contour interval for a map with scale 1 : 10000 is
  • 2 m
  • 5m
  • 10 m
  • 20 m
Q19 | Select the correct statement.
  • A contour is not necessarily a closed curve.
  • A contour represents a ridge line if the concave side of lower value con┬Čtour lies towards the higher value contour.
  • Two contours of different elevations do not cross each other except in case of an overhanging cliff.
  • All of the above statements are correct.
Q20 | A series of closely spaced contour lines represents a
  • steep slope
  • gentle slope
  • uniform slope
  • plane surface
Q21 | Direct method of contouring is
  • a quick method
  • adopted for large surveys only
  • most accurate method
  • suitable for hilly terrains
Q22 | In direct method of contouring, the process of locating or identifying pointslying on a contour is called
  • ranging
  • centring
  • horizontal control
  • vertical control
Q23 | In the cross-section method of indirect contouring, the spacing of cross-sections depends uponi) contour intervalii) scale of planiii) characteristics of groundThe correct answer is
  • only (i)
  • (i)and(ii)
  • (ii) and (iii)
  • (i), (ii) and (iii)
Q24 | Which of the following methods of con-touring is most suitable for a hillyterrain ?
  • direct method
  • square method
  • cross-sections method
  • tacheometric method
Q25 | Select the correct statement.
  • Contour interval on any map is kept constant.
  • Direct method of contouring is cheaper than indirect method.
  • Inter-visibility of points on a contour map cannot be ascertained.
  • Slope of a hill cannot be determined with the help of contours.