Examples_objective PDF Surveying Questions

If the back sight reading at point A is greater than the fore sight reading at point B then (a) A is higher than B. (b) B is higher than A. (c) height of the instrument is required to know which point is higher. (d) instrument position is required to know which point is higher. Answer b When a level...

If the back sight reading at point A is greater than the fore sight reading at point B then (a) A is higher than B. (b) B is higher than A. (c) height of the instrument is required to know which point is higher. (d) instrument position is required to know which point is higher. Answer b When a level is in adjustment, the line of sight of the instrument is (a) perpendicular to the vertical axis of the instrument and parallel to the bubble tube axis. (b) perpendicular to the vertical axis of the instrument and bubble level axis. (c) perpendicular to the bubble tube axis and parallel to the vertical axis. (d) none of the above. Answer A The height of instrument method of reducing levels is preferred when (a) there are large numbers of intermediate sights. (b) there are no intermediate sights. (c) there are large numbers of fore sights. (d) there are no fore sights. Answer A Balancing of sights mean (a) making fore sight reading equal to back sight reading. (b) making the line of collimation horizontal. (c) making the distance of fore sight station equal to that of the back sight station from the instrument station. (d) taking fore sight and back sight readings at the same station. Answer c If area calculated by end - areas rule and prismoidal rule are Ae and Ap. respectively, then (Ae - Ap) (a) is always positive. (b) is always negative. (c) may be positive or negative. (d) is equal to zero. Answer a Closed contours of decreasing values towards their centre, represent A. a hill B. a depression C. a saddle or pass D. a river bed. An imaginary line joining the points of equal elevation on the surface of the earth, represents A. contour surface B. contour gradient C. contour line D. level line E. none of these. For true difference in elevations between two points A and B, the level must be set up a) At any point between A and B b) At the exact midpoint of A and B c) Near the point A d) Near the point B. Answer b Contour interval is (a) The vertical distance between two consecutive contours (b) The horizontal distance between two consecutive contours (c) The vertical distance between two points on same contour (d) The horizontal distance between two points on same contour Answer: a 1. _______ is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. a) Contour gradient b) Contour interval c) Contour slope d) Contour inclination Which of the following cannot be used to locate the contour gradient in the field? a) Clinometer b) Theodolite c) Level d) Chain If a level is used to locate the contour gradient, it is not necessary to set the level on the contour gradient. a) True b) False If the inclination of contour gradient is given, its direction from a point may be easily located either on the map or on the ground. a) True b) False To locate the contour gradient, the level is set at a commanding position and reading on the staff at the second point is taken. a) True b) False In a direct method, the contour to be plotted is actually traced on the ground. a) True b) False The indirect method serves as a basis for the interpolation of contours. a) True b) False Choose the correct answers: - A circular curve is most suited for connecting a)Two straights in horizontal plane only. (b) Two straights in vertical plane only. c) Two straights, one in horizontal plane and the second in vertical plane. d) Two straights in horizontal plane or vertical plane. Answer :a 2-In which direction latitude of the line is negative? a) North b) South c) East d) West Answer: b -The horizontal angle between the true meridian and magnetic meridian is known as: a) True bearing b) local attraction c) dip d) magnetic declination. Answer: d - Straight distance between the end points of a circular curve(radius R, deflection angle Ɵ )is a) 2Rsec Ɵ/2 b) 2Rsin Ɵ/2 c) 2Rtan Ɵ/2 d) 2Rcos Ɵ/2 Answer: b - If the Azimuth of AB= 190º 24ʹ and CB= 260º 44ʹ angle ABC is: a)70° 20ʹ b)150° 20ʹ c) 271° 80ʹ d) 99° 16ʹ Answer: a -The Azimuth of the lines AB and BC are 146° 30′ and 68° 30′. The included angle ABC is: a) 45° b) 102° c) 78° d) None of these. Answer: d - In which direction latitude of the line is positive? a) North b) South c) East d) West Answer: a