JNTU
JNTU B.Tech II MINE SURVEYING Previous Question Paper (December - 2018 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is well-conditioned triangle?
Answer
A well-conditioned triangle is one in which no angle is less than 30° and no angle is greater than 120°. Such triangles are preferred in surveying because they minimize errors in plotting and calculation, ensuring higher precision.
Convert the following quadrantal bearing to whole circle bearing: i) S37°55'E ii) S49°20'W iii) N80°15'W
Answer
The conversions from Quadrantal Bearing (QB) to Whole Circle Bearing (WCB) are as follows:
- S37°55'E (Second Quadrant): WCB = 180° - 37°55' = 142°05'
- S49°20'W (Third Quadrant): WCB = 180° + 49°20' = 229°20'
- N80°15'W (Fourth Quadrant): WCB = 360° - 80°15' = 279°45'
Define benchmark and reduced level.
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Enlist and explain the types of errors in leveling.
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Distinguish between triangulation and traversing.
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Explain what is meant by triganametric levelling.
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State the elements of simple circular curve.
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Write about anallatic lens.
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State the purpose of correlation survey.
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What is satellite station?
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Part B
The following bearings were taken in running a compass traverse. Identify the stations that are affected by local attraction and determine the correct bearings. Calculate the true bearings if the declination was 1°30'W.
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Illustrate the procedure involved in three point problem and traversing.
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The following staff readings were taken with a level: 2.665, 3.745, 3.830, 2.275, 2.645, 0.385, 0.960, 1.640, 2.845, 3.845, 2.680 and 3.265m. The instrument was shifted after the 4th, 7th and 10th reading. The first reading was taken on a Bench mark with R.L. of 100.00 m. Enter the reading in the form of a level book page. Find the R.L. of stations and apply usual checks.
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In running Fly levels from a BM of RL 250m, the following readings were obtained: Backsight: 1.315, 2.035, 1.980, 2.625; Foresight: 1.150, 3.450, 2.255. From the last position of the instrument, five pegs at 20m interval are to be set out on a uniform rising gradient of 1 in 40. The first is to have an R.L. of 247.245m. Work out the staff readings required for setting the tops of the pegs on the given gradient.
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Describe Bowditch method with a neat sketch.
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Describe the method of measurement of vertical angle using theodolite.
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A new control station F is to be established from existing co-ordinated points of triangle station T and D. The horizontal clockwise angles at T and D have been observed as angle DTF to be 44°52'36" and angle TDF to be 284°26'38". Calculate the co-ordinates of station F given that co-ordinates of T are 3931.82 m East, 7491.98m North and of D are 2959.39 m East and 7487.09 m North.
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Compute the area included between the chain line and the boundary given specific offset distances.
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A new road is to be constructed with formation width of 20 m, side slopes of 1 vertical to 2.5 horizontal. The heights of fill at the center line of three successive cross sections, 50 m apart, are 3.3 m, 4.1 m, and 4.9 m, respectively. The existing ground has a crossfall of 1 in 10. Calculate the volume of the fill.
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A circular curve of 250 m radius is to be set out between two straights having deflection angle of 45°20′ right, and chainage of the point of intersection as 112 00 m. Calculate the necessary data for setting out the curve by taking the length of one chain as 20 m.
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Write about measurement of depth of shaft in mine surveys.
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Describe Weissbach triangle method in detail.
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Write short note on: a) Mine plans and sections b) Weiss quadrilateral method.
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