Surveying Questions

• Straight, parallel and widely spaced contours represent
• The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is
• It is more difficult to obtain good results while measuringhorizontal distance by stepping
• Pick up the incorrect statement from the following :
• If + 0.8% grade meets - 0.7% grade and the rate of change of grade for 30 m distance is 0.05, the length of the vertical curve will be
• In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is
• If D is the degree of the curve of radius R, the exact length of its specified chord, is
• The 10 mm markings on a levelling staff placed at 20 m are separated by
• Tilt of the staff in stadia tacheometry increases the intercept if it is
• A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic
• If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is sloping
• The properties of autogenous curve for automobiles are given by
• To orient a plane table at a point with two inaccessible points, the method generally adopted, is
• In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for temperature, slope and sag, the angular error of closure not to exceed (where n is the number of traverse legs)
• Pick up the correct statement from the following :
• The bearing of lines OA and OB are 16° 10' and 332° 18', the value of the included angle BOA is
• The additional lines which are measured to show the correctness of the chain surveying are called:
• If h1 and h2 are the differences in level between ground and the formation levels, m is the slope of the sloping sides. D is the distance between the cross sections then, prismoidal correction for a level section is
• If F is the pull applied at the ends of tape in kg, l is the length of tape between end marks in metres, w is the weight of the tape in kg per metre run, then sag correction
• The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is