Surveying and Levelling

221. Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and other cultural details, are known as

1. Cadastral surveys
2. City surveys
3. Topographical surveys
4. Guide map surveys

View answer

222. Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas are known

1. Plane surveys
2. Geodetic surveys
3. Geographical surveys
4. Topographical surveys

View answer

223. Systematic errors are those errors

1. Which cannot be recognised
2. Whose character is understood
3. Whose effects are cumulative and can be eliminated
4. None of these

View answer

224. Tacheometric formula for horizontal distances using horizontal sights can also suitable be employed for inclined sights through θ by multiplying

1. The constants by sin²θ
2. The constants by cos²θ
3. The constands by cosθ
4. The multiplying constant by cos²θ and additive constant by costθ

View answer

225. The 10 mm markings on a levelling staff placed at 20 m are separated by

1. 1/1000 radian
2. 1/1500 radian
3. 1/2000 radian
4. 1/2500 radian

View answer

226. The accuracy of measurement in chain surveying, does not depend upon

1. Length of the offset
2. Scale of the plotting
3. Importance of the features
4. General layout of the chain lines

View answer

227. The additional lines which are measured to show the correctness of the chain surveying are called:

1. Check clines
2. Proof lines
3. Tie lines
4. All of these

View answer

228. The angle between the prolongation of the preceding line and the forward line of a traverse is called

1. Deflection angle
2. Included angle
3. Direct angle
4. None of the above

View answer

229. The angle between two plane mirrors of optical square, is

1. 20°
2. 30°
3. 45°
4. 60°

View answer

230. The angle of intersection of a contour and a ridge line, is

1. 30°
2. 45°
3. 60°
4. 90°

View answer