251. In a precision traverse, included angles are measured by setting the vernier
252. Governor took oath infront of?
253. If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum perpendicular offset for the transition curve, is
254. When was the decimal system of currency introduced in India?
255. An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called
256. An angles of 45° with a chain line may be set out with
257. The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as
258. A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39. The correct staff reading from this set up at S should be
259. 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
260. The rise and fall method of reduction of levels, provides a check on
261. In tangential tacheometry, an ordinary level staff is used
262. The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as
263. The staff intercept will be
264. Horizontal distances obtained tacheometerically are corrected for
265. If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is
266. In setting up a plane table at any station
267. Ranging is an operation of
268. Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are known
269. In a theodolite
270. Whole circle bearing of a line is preferred to a quadrantal bearing merely because
271. Tilt of the staff in stadia tacheometry increases the intercept if it is
272. To orient a plane table at a point with two inaccessible points, the method generally adopted, is
273. The combined effect of curvature and refraction over a distance L kilometres is
274. Number of links per metre length of a chain are
275. The method generally preferred to for contouring an undulating area, is