Subject 2018 Question Paper — Government College of Engineering and T…

Instructions

• Attempt five questions in all selecting at least one question from each Module.
• Each question carries 20 marks.
• Assume suitable missing data if required.

Questions

Module-I

• Q1(a). Explain axis signal correction. Obtain expression for the axis signal correction. [10 marks]
• Q1(b). Find the RL of Q from the following data. Horizontal Distance between P and Q= 9450 m Angle of elevation from P to Q= $2^{\circ} 15'$ Height of signal at Q= 4.0m Height of instrument at P= 1.25m Coefficient of refraction = 0.07 R sin 1" = 30.88 RL of P = 410.0m [10 marks]
• Q2(a). Explain bowditch and transit rule. [10 marks]
• Q2(b). A traverse ABCDEA was conducted and due to difficulties in the field the bearing of line EA and length of line DE could not be measured. Find out the missing quantities. Side | Length(m) | Bearing AB | 301.5 | $N74^{\circ}30'E$ BC | 288.4 | $S60^{\circ}15'E$ CD | 199.5 | $S30^{\circ}45'W$ DE | -- | $N82^{\circ}15'W$ EA | 201.4 | -- [10 marks]

Module-II

• Q3(a). Explain the method of making sets while measuring angles with the repetition and reiteration methods. [10 marks]
• Q3(b). To determine the elevation of A, the following observations were made in a tachometric survey, the staff being held vertically. The instrument is fitted with anallactic lens and value of constant is100 and R.L of bench mark is 158.025m. Inst Stn. | Ht.of Inst. | Staff station | Vertical angle | Hair readings O | 1.44 | BM | $-5^{\circ}40'$ | 1.332, 1.896, 2.460 O | 1.44 | CP | $+8^{\circ}20'$ | 0.780, 1.263, 1.746 A | 1.38 | CP | $-6^{\circ}24'$ | 1.158, 1.617, 2.076 [10 marks]
• Q4(a). State characteristics of tachometer and principle of tacheometry. [10 marks]
• Q4(b). A,B and C are the stations of a triangle. As station B could not be occupied a satellite station S 21.4m from B, was occupied and C were on opposite sides of the line AB. The angles measured were BSC= $61^{\circ}18'24"$ and ASC=$69^{\circ}38'12"$. The length BC=7180.55 m and BA=10357. 67m.Find angle ABC. [10 marks]

Module-III

• Q5(a). Two straight lines AB and BC intersect at a point B of chainage 1100m. To avoid an obstacle another line PQ is taken to connect AB and BC, so that angle APQ= $140^{\circ}$ and angle PQC =$155^{\circ}$. The radius of first arc is 400 m and that of second is 300 m .calculate changes of tangent points and point of compound curvature. [10 marks]
• Q5(b). Derive an expression for the length and shift of a transition curve required for a first class railway track. [10 marks]
• Q6(a). Two parallel lines 250m apart are to be joined by a reverse curve with a deflection angle of 30degree. If the radius of the first arc is 500m and the chainage of first point of curve is 1600m, calculate the radius of the second arc, chainage of point of reverse curvature and chainage of the finishing point of reverse curvature. [10 marks]
• Q6(b). Explain setting out of simple circular curve by offset from long chord. [10 marks]

Module-IV

• Q7(a). Explain briefly location of sounding stations by means of intersecting angles. [10 marks]
• Q7(b). Differentiate between active and passive remote sensing system. [10 marks]
• Q8(a). Differentiate between GPS surveying and GPS Navigation. [10 marks]
• Q8(b). Explain the following terms (i) Observations from shore (ii) Observations from boat [10 marks]