177. The zero of the graduated circle of a prismatic compass is located at
178. A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 106 kg/cm2, the correction to be applied is
179. The bearing of AB is 190° and that of CB is 260° 30'. The included angle ABC, is
180. The power of a lens
181. In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to
182. If h is the difference in height between end points of a chain of length l, the required slope correction is
183. The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called
184. Bergchrund is a topograhical feature in
185. 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
186. The chaining on sloping ground is
187. Profile levelling is usually done for determining
188. For indirect ranging, number of ranging rods required, is
189. Correction per chain length of 100 links along a slope having a rise of 1 unit in n horizontal units, is
190. The operation of resection involves the following stepsrough orientation of the plane tablethe three lines form a triangle of errordrawing lines back through the three control pointsselect a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwisethe points obtained by three rays is the correct location.
The correct sequence is
191. The ratio of the length of long chord and the tangent length of a circular curve of radius R deflecting through angle Δ, is
192. To avoid large centering error with very short legs, observations are generally made
193. During secular variation of magnetic meridian at different places
194. Designation of a curve is made by :
195. If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs, the accuracy of the traverse may be improved by
196. Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to
197. Rankine's deflection angle in minutes is obtained by multiplying the length of the chord by
198. The opposite of 'wander'.?
199. The line of collimation method of reduction of levels, does not provide a check on
200. If L is the specified length of a tape, L1 its actual length and S the measured distance, then, the true distance is given by the formula,