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Transportation Engineering - II (October 2010)

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Total No. of Questions : 12] [Total No. of Pages : 5 [3864] - 120 P 1031 B.E. (Civil) TRANSPORTATION ENGG. - II (2003 Course) (401009) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6 from Section I and Q.7 or Q.8, Q.9 or Q.10, Q.11 or Q.12 from Section II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, electronic pocket non-programmable calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) b) c) d) State the objects of Highway planning. Discuss the classification of [2 + 4 = 6] highways according to 3rd 20 year road plan. Write an explanatory note on Highway - planning surveys. [4] Discuss in brief about Road side interview and Return post card methods in context of O & D studies. [2 + 2 = 4] Write a short note on Fly overs as a sort of remedial measure to reduce the traffic jam with reasons. [3] OR Q2) a) b) c) Describe the following term w.r.t. traffic engineering. [4 x 2 = 8] i) Road user characteristics ii) Traffic signals iii) Spot speed studies iv) Intersections. Discuss with suitable examples for the preparation of Master plan during highway development programme, undertaken by you. [5] Draw illustrative sketches of any 2 types of road patterns. Also state the [2 + 2 = 4] significance of each. P.T.O. Q3) a) b) c) Discuss the various other factors which control the alignment besides to obligatory points. [4] Carry out the analysis of stopping sight distance by stating also the meanings of important key words. [5] Determine the design length of transition curve and the shift from the following data given. [8] V = Design speed = 65 kph. R = Radius of circular curve = 220 mtr. 80 C = Allowable rate of change of centrifugal acceleration C = m/sec3. 70 + V Allowable rate of introduction of super elevation assuming that the pavement rotated about the centreline = 1 in 150. Pavement width including extra Widening = 7.50 mtr. OR Q4) a) b) c) Q5) a) b) c) d) Discuss the importance of Highway drainage and also, state how these are achieved? [4] With the aid of a neat sketch, carryout the analysis of super elevation on horizontal curves. [5] Determine the safe overtaking sight distance for both ONE WAY traffic and TWO WAY traffic sitations, for a design speed of 96 kph. Assume all other data suitably as per IRC recommendations only. [8] State clearly the requirements of design of pavements. Also discuss the various factors. [2 + 2 = 4] Briefly narrate the construction procedure of Water Bound Macadam (WBM) roads. [4] Describe the terms : i) Radius of relative stiffness. ii) Radius of resisting section. Also, state the formula you use for these. [2 + 2 = 4] Draw an illustrative sketches of the following i) Aggregate crushing value test apparatus with accessories. ii) Sofeting point test apparatus with accessory used to carryout this test on Bitumen sample. [2 + 2 = 4] OR [3864] - 120 -2- Q6) a) b) c) d) State clearly the IRC recommendations for the CBR method of design. [4] Explain these terms i) ESWL. ii) Modulus of Subgrade reaction. Also, state the significance of each. [2 + 2 = 4] Write an explanatory notes on i) Temperature stresses in case of C.C. Pavements. ii) Joints in C.C. pavements. [2 + 2 = 4] State the validity of the test results which you have obtained in the Laboratory when the tests performed on aggregate and Bitumen samples w.r.t. the following i) Impact value. ii) Elongation and Flakiness index. iii) Softening point. iv) Flash & Fire points. [1 each = 4] SECTION - II Q7) a) b) c) Explain the following terms : i) Hangars and Aprons. ii) Aircraft weights. iii) Minimum Cirding Radius. iv) Calm period. [4 x 1 1 = 6] 2 Write a short note on : i) Airport capacity. ii) Wind Rose type II. [3 + 3 = 6] Clearly define the term effective gradient and hence determine the effective gradient of runway from the following data, which refers to the proposed longitudinal section of runway. You may take 1 metric chain = 20 m. Also, draw the sketch of longitudinal section of runway by stating the total length. [1 + 4 = 5] End to End of Runway Gradient 0.0 to 5.0 chains +1.0% 5.0 to 15.0 1.0% 15.0 to 30.0 +0.8% 30.0 to 40.0 +0.2% OR [3864] - 120 -3- Q8) a) b) c) Q9) a) b) c) d) Explain the following terms i) Minimum Turning Radius. ii) Cross wind component. iii) Separation clearance. Draw suitable sketches also. [3 x 2 = 6] Give detail classification of Airports. [5] The length of Runway under standard conditions is 1620 mtr. The Airport site has an elevation of 270 mtr above mean sea level. Its reference temperature is 32.90oC. If the runway is to be constructed with an effective gradient of 0.20%, Determine the corrected runway length. Also, carryout the usual checks as per ICAO. Report the correct length to the nearest 10 mtr. [6] Draw an illustrative sketch of R.C.C. bridge showing various elements w.r.t. i) Plan. ii) Sectional Elevation. iii) Sideview. [1 1 + 2 + 1 1 = 5] 2 2 Write short note on : i) IRC class AA loading. ii) Ill effects of Scour. [2 + 2 = 4] Draw neat sketches of the following. Also, label the parts. i) Column bents. ii) Abutment for an arch bridge. [2 + 2 = 4] The approximate costs of one pier and one super-structure span for a multiple span bridge for various lengths of span are given under. Determine the economic span. [4] Span Cost of one pier Cost of one super structure (m) (Rs.) (Rs.) 10 25000 7000 15 28000 13815 20 32500 31000 25 33700 36000 30 34800 41400 OR Q10)a) b) How do you estimate the design discharge by Indirect method? Explain.[5] Describe the following terms i) Economic span. ii) Height of afflux. iii) Lacey s silt factor. iv) Water way of a bridge. [4 x 1 = 4] [3864] - 120 -4- c) d) Q11)a) b) c) d) The normal velocity of flow in a river is 1.50 m/sec. The normal and the artificial waterway under the bridge respectively are 8000 m2 and 7000 m2. Determine the height of afflux using Molesworth s formula. Also find the increase in velocity due to afflux. Assume g = 9.81 m/sec/sec. [4] Enlist and describe in brief the different loads that are acting on an abuttment of a bridge. [4] Draw an illustrative sketches of the following : i) Cable stayed bridges. ii) Cut boat bridges. iii) Knuckle bearings. iv) Bascule bridges. [4 x 1 1 = 6] 2 Write a detail note on Maintenance of bridges. [4] Discuss the various types of culverts w.r.t. their suitability of use in the field. [3] Differentiate between i) Cantilever bridges and Bascule bridges. ii) Fixed bearing and Free bearing. iii) Movable span and Fixed span bridges. [3] OR Q12)a) b) c) d) Differentiate between i) Rocker and Roller bearing & Expansion bearing. ii) Slab culvert and Box culvert. iii) Suspension and cable stayed bridges. [3] Discuss the various types of movable span super structures with respect to their suitability only. [3] Write a detail note on the different errection methods employed during construction of bridges. [4] Draw an illustrative sketches of the following : [4 x 1 1 = 6] 2 i) Flying bridges. ii) Scuppers. iii) Elastomeric bearing. iv) Pipe culvert. [3864] - 120 -5-

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