A. incorrect levelling of the magnetic needle
B. loss of magnetism of the needle
C. friction of the needle at the pivot
D. presence of magnetic substances near the instrument
Related Mcqs:
- The prismatic compass and surveyor’s compass________________?
A. give whole circle bearing (WCB. of a line and quadrantal bearing (QB. of a line respectively
B. both give QB of a line and WCB of a line
C. both give QB of a line
D. both give WCB of a line - The cross hairs in the surveying telescope are placed_____________?
A. midway between eye piece and objec¬tive lens
B. much closer to the eye-piece than to the objective lens
C. much closer to the objective lens than to the eye piece
D. anywhere between eye-piece and objective lens - The type of surveying which requires least office work is________________?
A. tacheomefry
B. trigonometrical levelling
C. plane table surveying
D. theodolite surveying - Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ?
A. radiation
B. intersection
C. traversing
D. resection - The error due to eccentricity of inner and outer axes can be eliminated by________________?
A. reading both verniers and taking the mean of the two
B. taking both face observations and taking the mean of the two
C. double sighting
D. taking mean of several readings distributed over different portions of the graduated circle - 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 - If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated____________?
A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate - In the quadrantal bearing system, a whole circle bearing of 293° 30′ can be expressed as______________?
A. W23°30’N
B. N66°30’W
C. S113°30’N
D. N23°30’W - The rise and fall method_______________?
A. is less.accurate than height of instrument method
B. is not suitable for levelling with tilting levels
C. provides a check on the reduction of intermediate point levels
D. quicker and less tedious for large number of intermediate sights - If in a closed traverse, the sum of the north latitudes is more than the sum of the south latitudes and also the sum of west departures is more than the sum of the east departures, the bearing of the closing line is in the________________?
A. NE quadrant
B. SE quadrant
C. NW quadrant
D. SW quadrant
