Civil Survey Objective Type Questions - Set 10 - ObjectiveBooks

# Practice Test: Question Set - 10

1. Closed contours, with higher value inwards, represent a
(A) Depression
(B) Hillock
(C) Plain surface
(D) None of the above

2. If ‘h’ is the difference in height between end points of a chain of length ‘l’, the required slope correction is
(A) h2/2l
(B) h/2l
(C) h2/l
(D) 2h2/2l

3. The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as
(C) Clinometer
(D) Tacheometer

4. Pick up the correct statement from the following
(A) The contour lines having the same elevation cannot unite and continue as one line
(B) A contour can not end abruptly, but must ultimately close itself not necessarily within the limits of map
(C) The direction of steepest slope at a point on a contour is at right angles to the contour
(D) All the above

5. An imaginary line joining the points of equal elevation on the surface of the earth, represents
(A) Contour surface
(C) Contour line
(D) Level line

6. 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 than the sum of the east departures, the bearing of the closing line is in the

7. The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescopes
(A) Resolving power
(B) Brightness
(C) Field of view
(D) Magnification

8. Pick up the correct statement from the following:
(A) Mistakes arise from inattention, inexperience or carelessness
(B) Systematic errors persist and have regular effects in the survey performances
(C) Accidental errors occur inspite of every precaution is taken
(D) All the above

9. To orient a plane table at a point with two inaccessible points, the method generally adopted, is
(A) Intersection
(B) Resection
(D) Two point problem

10. In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by
(A) Adding 180°, if the given bearing is less than 180°
(B) Subtracting 180°, if the given bearing, is more than 180°
(C) Changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
(D) None of these

11. 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
(A) d
(B) 1/d
(C) d2
(D) 1/d2

12. Back bearing of a line is equal to
(A) Fore bearing ± 90°
(B) Fore bearing ± 180°
(C) Fore bearing ± 360°
(D) Fore bearing ± 270°

13. To orient a plane table at a point ‘P’ roughly south of the mid-point of two inaccessible conical hill stations ‘A’ and ‘B’ in the plains, a point ‘C’ is selected in line with AB and table is oriented at ‘C’ by bringing ab in line with ABA ray is then drawn towards ‘P’ and at ‘P’ the table is oriented by back ray method. The orientation so obtained, is
(A) Unique and correct
(B) Incorrect
(C) Manifold and correct
(D) Not reliable

14. While setting a plane table at a station it was found that the error in centering was 30 cm away from the ray of length 40 m drawn from the station. If the scale of the plan is 1 cm = 2 cm, the displacement of the end of the ray in plan from the true position will be
(A) 0.02 cm
(B) 0.15 cm
(C) 0.2 cm
(D) 0.1 cm

15. If ‘Î¸’ is the slope of the ground and ‘l’ is the measured distance, the correction is
(A) 2l sin2 Î¸/2
(B) 2l cos2 Î¸/2
(C) 2l tan2 Î¸/2
(D) 2l cot2 Î¸/2

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