Surveying Questions

• While measuring the distance between two points along upgrade with the help of a 20 m chain, the forward end of the chain is shifted forward through a distance
• If the whole circle bearing of a line is 180°, its reduced bearing is
• For indirect ranging, number of ranging rods required, is
• 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 AB. A ray is then drawn towards P and at P the table is oriented by back ray method. The orientation so obtained, is
• The ratio of the length of long chord and the tangent length of a circular curve of radius R deflecting through angle Δ, is
• During secular variation of magnetic meridian at different places
• Mistakes which may produce a very serious effect upon the final results arise due to
• The method of reversal
• For high sensivity of the bubble tube
• The smaller horizontal angle between the true meridian and a survey line, is known
• The bearing of C from A is N 30° E and from B, 50 metres east of A, is N 60° W. The departure of C from A is
• If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is
• The difference in the lengths of an arc and its subtended chord on the earth surface for a distance of 18.2 km, is only
• If α and β be the elevations of two objects A and B respectively, θ be the angle observed by a sextant. The correct horizontal angle is
• An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called
• In horizontal angles, the error due to imperfect levelling of the plate bubble is
• The slope correction for a 3° slope for a length of 100 m, is
• If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on
• The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as
• While surveying a plot of land by plane tabling, the field observations