## Surveying - 1 - Dec 2015

### Civil Engineering (Semester 3)

TOTAL MARKS: 80

TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.

(2) Attempt any **three** from the remaining questions.

(3) Assume data if required.

(4) Figures to the right indicate full marks.

### Attempt any four:

**1 (a)** Explain the principle of surveying.(5 marks)
**1 (b)** Differentiate between surveyors and prismatic compass.(5 marks)
**1 (c)** Explain temporary adjustments of dumpy level.(5 marks)
**1 (d)** Enlist the advantages and disadvantages of plane table surveying.(5 marks)
**1 (e)** Procedure for direct measurement of horizontal angle using theodolite.(5 marks)
**2 (a)** What is bearing of a line? Explain different types of bearings.(4 marks)
**2 (b)** Explain the methods of adjusting and testing the chain.(8 marks)
**2 (c)** The following bearings was taken while conducting a close traverse with a compass in a place there local attraction was suspected. At what stations do you suspect local attraction? Find the corrected bearings for local attraction and for declination of 1°30'w

Line |
FB |
BB |

AB | 80°45' | 260°00' |

BC | 130°30' | 311°35' |

CD | 240°15' | 60°15' |

DA | 290°30' | 110°10' |

**3 (a)**Explain Differential levelling & reciprocal levelling.(10 marks)

**3 (b)**The following consecutive readings were taken with a level and 4.0m Staff on a continuously sloping ground at a common interval of 30 mt 0.780, 1.535, 1.955, 2.430, 2.985, 3.480, 1.155, 1.960, 2.365, 3.640, 0.935, 1.045, 1.630 and 2.545.

The RL of first point A was 180.75 m. Rule out a page of level book & enter above readings. Calculate the RL of all the points by Rise & Fall Method. Also calculate the gradient of the line joining the first & last point.(10 marks)

**4 (a)**What is contour? Explain the different characteristics of contour also explain different methods of interpolating contours along with suitability of each one of them.(7 marks)

**4 (b)**The length of tracing arm of a planimeter is 15.92 cm. The distance from the hinge to the anchor point is 16.0 cm. The diameter of the rim of the wheel is 2 cm. The wheel is placed outside at a distance of 3.0 cm from the hinge. Calculate area corresponding to revolution of the wheel and the area of zero circle.(7 marks)

**4 (c)**The following perpendicular offsets were taken from a chain line to an irregular boundary. Calculate the area using Trapezoidal and Simpson's rule.

Chainage (m) |
0 | 30 | 60 | 90 | 120 | 150 | 180 | 210 |

offsets (m) |
0 | 2.65 | 3.80 | 3.75 | 4.65 | 3.60 | 5.00 | 5.18 |

**5 (a)**In a four-sided closed traverse ABCDA, the following information is given.

Fill in the missing data.

Side |
Length (mt) |
Deflection angle |
Bearing |
Co-ordinates |

AB | 160 | ? | S40° | ? |

BC | 340 | 116(L) | ? | 26500 S Point B 22400 W |

CD | 210 | 60°(L) | ? | |

DA | ? | ? | ? | ? |

**5 (b)**Explain is detail the procedure for solving two-point problem on field of plane table surveying.(8 marks)

### Explain any four:-

**6 (a)** Gales table(5 marks)
**6 (b)** Local attraction and its eliminations.(5 marks)
**6 (c)** Method of calculation of earthwork by spot level.(5 marks)
**6 (d)** Errors in chaining(5 marks)
**6 (e)** Ranging and its methods.(5 marks)
**6 (f)** Measurement of deflection angle between two point using theodolite.(5 marks)