Civil Engineering MCQs

Page No. 268

The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be_______________?


aequidistant from A and B


b closer to the higher station


ccloser to the lower station


das far as possible from the line AB



Sensitiveness of a level tube is designated by______________?


aradius of level tube


blength of level tube


clength of bubble of level tube


dnone of the above


View Answer radius of level tube

Dumpy level is most suitable when______________?


athe instrument is to be shifted frequently


bfly levelling is being done over long distance


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


dall of the above



Contour interval is_______________?


a inversely proportional to the scale of the map


bdirectly proportional to the flatness of ground


clarger for accurate works


dlarger if the time available is more



The suitable contour interval for a map with scale 1 : 10000 is______________?


a2 m


b 5m


c10 m


d20 m


View Answer 2 m

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_______________?


ad


b1/d


cd2


d1/d2


View Answer d2

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_______________?


a94.80 m


b 99.71 m


c100.29 m


d105.20 m


View Answer 105.20 m

With the rise of temperature, the sensitivity of a bubble tube______________?


adecreases


bincreases


cremains unaffected


dnone of the above


View Answer decreases

The difference between a level line and a horizontal line is that_______________?


alevel line is a curved line while hori-zontal line is a straight line


b level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line


c horizontal line is normal to plumb line while level line may not be normal to the plumb line


dboth are same



The rise and fall method_______________?


ais less.accurate than height of instrument method


bis not suitable for levelling with tilting levels


c provides a check on the reduction of intermediate point levels


dquicker and less tedious for large number of intermediate sights



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