Theodolite is an instrument used for_________________?
(A) tightening the capstan-headed nuts of level tube
(B) measurement of horizontal angles only
(C) measurement of vertical angles only
(D) measurement of both horizontal and vertical angles
The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be_______________?
(A) equidistant from A and B
(B) closer to the higher station
(C) closer to the lower station
(D) as far as possible from the line AB
Sensitiveness of a level tube is designated by______________?
(A) radius of level tube
(B) length of level tube
(C) length of bubble of level tube
(D) none of the above
Dumpy level is most suitable when______________?
(A) the instrument is to be shifted frequently
(B) fly levelling is being done over long distance
(C) many readings are to be taken from a single setting of the instrument
(D) all of the above
Contour interval is_______________?
(A) inversely proportional to the scale of the map
(B) directly proportional to the flatness of ground
(C) larger for accurate works
(D) larger if the time available is more
The suitable contour interval for a map with scale 1 : 10000 is______________?
(A) 2 m
(B) 5m
(C) 10 m
(D) 20 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_______________?
(A) d
(B) 1/d
(C) d2
(D) 1/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_______________?
(A) 94.80 m
(B) 99.71 m
(C) 100.29 m
(D) 105.20 m
With the rise of temperature, the sensitivity of a bubble tube______________?
(A) decreases
(B) increases
(C) remains unaffected
(D) none of the above
The difference between a level line and a horizontal line is that_______________?
(A) level 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
(D) both are same