Surveying and Levelling

181. Numbers of links per metre length of a chain are

  1. 2
  2. 5
  3. 7
  4. 10

Correct answer: (B)
5

182. Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to

  1. 14.14 m
  2. 28.28 m
  3. 200 m
  4. None of these

Correct answer: (B)
28.28 m

183. On a diagonal scale, it is possible to read up to

  1. One dimension
  2. Two dimensions
  3. Three dimensions
  4. Four dimensions

Correct answer: (C)
Three dimensions

184. One of the Lehmann's rules of plane tabling, is

  1. Location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances
  2. When looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray
  3. When the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays
  4. None of these

Correct answer: (A)
Location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances

185. One of the tacheometric constants is additive, the other constant, is

  1. Subtractive constant
  2. Multiplying constant
  3. Dividing constant
  4. Indicative constant

Correct answer: (B)
Multiplying constant

186. Orientation of a plane table by solving two point problems is only adopted when

  1. Saving of time is a main factor
  2. Better accuracy is a main factor
  3. Given points are inaccessible
  4. None of these

Correct answer: (C)
Given points are inaccessible

187. Over-turning of vehicles on a curve can be avoided by using

  1. Compound curve
  2. Vertical curve
  3. Reverse curve
  4. Transition curve

Correct answer: (D)
Transition curve

188. Pantograph is used for

  1. Measuring distances
  2. Measuring areas
  3. Enlarging or reducing plans
  4. Setting out right angles

Correct answer: (C)
Enlarging or reducing plans

189. Permanent adjustments of a level are

  1. 2 in number
  2. 3 in number
  3. 4 in number
  4. 6 in number

Correct answer: (A)
2 in number

190. Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to

  1. Shift
  2. Twice the shift
  3. Thrice the shift
  4. Four times the shift

Correct answer: (D)
Four times the shift

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