Assignment Booklet
Diploma in Civil Engineering
DCLE (G)
(Fourth Semester)
Course Code
BCE-024
BCE-034
BCE-041
BCE-044
BCE-046
School of Engineering and Technology
Indira Gandhi National Open University
MAIDAN GARHI, NEW DELHI – 110 068
2008
Dear Student,
This booklet contains the assignments for the DCLE (G) – 4th Semester for the courses of
BCE-024, BCE-34, BCE-041, BCE-044 and BCE-046. Before attempting the assignments, please carefully read the instructions given in Programme Guide of DCLE(G) Programme. Each course (e.g. BCE 024 and BCE 046, etc.) has one assignment, which is based on course materials of these courses. You are also advised to write your responses in your own words. This will improve your comprehension skills. Further, you may note that in case your assignment response(s) happens to be a copy of assignment response sheet submitted by another student, your assignment may be summarily rejected by the Coordinator/Programme In-charge/Course Counsellor of your Study Centre/Programme Study Centre and/or your marks may be made null and void. Therefore, you are strongly advised not to allow any other student to copy it. The last date of submission of assignment is given against each assignment. You are advised not to wait for the last date to submit your assignments. Therefore, you may note that the assignment answer sheets received after the due date will be summarily rejected and no communication will be entertained in this regard.
You have to submit/send your assignment answer sheets to the Coordinator/Programme In-charge of your Study Centre/Programme Centre, as the case may be so as to reach there on or before the due date.
Instructions for Formatting Your Assignments
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Enrolment No. ______Date : ______
Course Code : ______Course Title : ______
Name : ______Address : ______
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Signature : ______
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All the students may please note that they are required to attempt assignments only for those courses/course topics for which they have registered and paid the requisite fee.
Wishing you all good luck!
Project Coordinator DCLE(G)
Q.1 (a) Describe the various types of shallow foundations with the help of a systematic sketch.
(b) Discuss the different properties of soil obtained from site investigations.
Q.2 (a) Explain the design of foundations.
(b) Discuss the various functions served by walls in a building.
Q.3 (a) What do you mean by Cavity Wall? Explain the various points which should be kept in mind during the construction of a Cavity Wall.
(b) Discuss the various tests required to be carried out to ascertain the quality of bricks in building construction.
Q.4 (a) Explain the procedure of Post-construction anti-termite treatment in buildings.
(b) Discuss the various causes of dampness of buildings.
Q.5 (a) Explain the water proofing of flat roof using mastic asphalt with the help of a neat sketch.
(b) “RCC lintels have practically replaced all other materials used for lintels”. Justify this statement.
Q.6 (a) What do you mean by lintels? Explain the various functions served by it.
(b) Explain the method of erection of centering for arch construction.
Q.7 (a) Discuss the various factors you would consider in the selection of upper floors.
(b) What type of flooring do you recommend for the operation theatre?
Q.8 (a) Explain the important points to be kept in mind while making the provisions for windows in a room.
(b) Describe the different types of hinges commonly used for doors and windows.
Q.9 Write short notes on the following :
(i) Partition wall
(ii) Excavation for foundation
(iii) Size of doors
(iv) Settlement of foundations
Q.10 Differentiate between the following :
(i) Stone and Brick masonry
(ii) Revolving doors and Rolling doors
(iii) Shallow and Deep foundations
(iv) Brick layer’s scaffolding and Mason’s scaffolding
Q.1 Inside dimension of a room is 3.80 m ´ 6.30 m and height of the room is 3.50 m. The plinth is above 70 cm from GL. Depth of foundation is 1.10 m. Lime concrete in foundation is 80 cm wide and 30 cm thick. First footing of brick work is 60 cm wide and 20 cm thick, second footing of brick work is 50 cm wide and 10 cm thick, third footing of brick work is 40 cm wide and
20 cm thick and plinth is 30 cm wide.
The walls are 20 cm thick in super structure with 1 : 6 cement mortar. There are two doors of size 1.20 ´ 2.10 m and one window 1.00 ´ 1.00 m. The section of window and doors frame is
7.50 ´ 11.00 cm. Calculate the following item of works :
(i) Earth work in foundation and plinth
(ii) Lime concrete in foundation
(iii) Brick work in foundation
(iv) Brick work in superstructure
(v) Wood works in frame of door and windows.
[Note : Item No. (i), (ii), (iii) and (iv) should be calculated by Long wall-Short wall method as well as Centre-line method.]
Q.2 RLs of ground along the centre line of a proposed road, from chainage 10 to chainage 20 are given as under :
Chainage / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 / 19 / 20RL of Ground (m) / 105.0 / 105.6 / 105.44 / 105.90 / 105.42 / 104.3 / 105.0 / 104.1 / 104.62 / 104.0 / 103.30
Formation level at 10th chainage point is 107.0 m and the road is in a downward gradient of 1 in 150, up to the chainage point 14, and then the gradient changes to 1 in 100 downward. Formation width of road is 10 m, and side slopes of the banking are 2 : 1 (H : V). Take length of each chain 30.00 m.
(i) Prepare an estimate of the earth work at the rate of Rs. 70/- per % m3.
(ii) Find also the cost of turfing side slopes at the rate of Rs. 20/- per % m2.
Q.3 Work out quantity of RCC and reinforcement for a RCC beam of size 300 mm ´ 600 mm, which is used over a clear span of 6.00 m. It has 20 cm bearing on both sides. There are 03 main bars of 16 mm f, one of them bent up at 45o at span/7. There are two anchor bars of
10 mm f at top. Beam has 8 mm f rings @ 150 mm c/c.
Q.4 Write down detailed specification of following items of works
(i) First class brick work in superstructure
(ii) Lime concrete in foundation
(iii) Distempering on walls
(iv) Earth work in soft rock, hard rock and loose soil.
Q.5 Differentiate between following (Any Four) :
(i) Lead and Lift
(ii) RCC and PCC
(iii) Tender and Contract
(iv) Minor work and Petty work
(v) Annual repair and Special repair.
Q.6 Write short notes on any four of the following :
(i) Schedule of rates
(ii) Administrative approval
(iii) Special repairs
(iv) Minor work
(v) Work charged establishment
Q.7 (a) Discus briefly the contract system for civil construction work from inviting of tender to allotment of contracts.
(b) What is Mid Sectional Area of computing earth work for cutting and filling?
Q.8 (a) What is borrow pit and spoil bank? What are their uses? Explain by help of neat sketches/drawing.
(b) Why estimation of hill road is tedious as compared to plain roads? What are the different types of sections in hill roads.
Q.9 Discus briefly the different forms of pointing used for brick masonry. Explain by help of illustration/neat sketches/drawing. Also list some of the important specifications.
Q.10 (a) Explain in brief the important consideration that governs a form work used for RCC work, such as, for floors, beams and columns.
(b) Write procedure of estimating wooden trusses step wise. Estimate a wooden King post or Queen post truss by taking actual dimensions from drawing available in your study material.
Q.1 Determine areas of tensile as well as compression reinforcement of doubly reinforced section of b D = 400 600 mm applied with a factored moment of 500 kN-m. Use M 25 concrete and Fe 415 steel and assume effective cover of 50 mm both for tensile as well as compressive reinforcement.
Q.2 Determine moment of resistance of a reinforced T section with bf = 1750 mm, Df = 115 mm,
D = 475 mm, d = 425 mm. Beam is reinforced with 5 25. Assume fck = 25 MPa;
fy = 415 MPa; and effective cover dc = 50 mm.
Q.3 Design a rectangular beam simply supported over an effective span of 6 m, if the superimposed load is 25 kN/m and support width is 600 mm each. Use M 20 mix and Fe 415 grade steel.
Q.4 Design a roof slab for a room 6.0 m ´ 4.0 m clear in size cast monolithically with beams; all four edges of slab are discontinuous edges. The slab has a topping of 120 mm thick lime terrace and 12 mm thick ceiling plaster. Design parameters are as follows :
Imposed load on roof = 2.5 kN/m2, fck = 20 N/mm2, fy = 415 N/mm2 and nominal
cover = 20 mm.
Q.5 Design a column of unsupported length of 3.50 m effectively held in position at both ends, restrained against rotation at one end. The column has a rectangular cross-section 400 ´ 500 and carries a factored load of 2750 kN. Determine area of longitudinal bars, diameter and pitch of lateral ties. Design parameters are : fy = 415 N/mm2, fck = 25 N/mm2, diameter of longitudinal bars = 25 mm.
Q.6 Design a rectangular footing for a superimposed load of 1500 kN. The safe bearing capacity for soil is 250 kN/m2. Use M 20 concrete and Fe 415 steel. Take size of column = 800 600; and nominal cover = 50 mm.
Q.7 Design the first flight of the dog-legged stair case for the following details :
Staircase size = 4.20 m ´ 2.55 m
Supporting wall thickness = 250 mm
Height between floors = 3.30 m
Rise (R) ´Tread (T) = 150 ´ 300 mm
Nominal cover = 25 mm
fck = 25 N/mm2,
fy = 415 N/mm2
Q.8 Design a reinforced concrete cantilever retaining wall of height 4.25 m above base to retain a level earth fill. Angle of repose of earth is 30° and unit weight of soil is 17.6 kN/m3. The safe bearing pressure of soil is 150 kN/m2. Assume fck = 25 N/mm2 and fy = 415 N/mm2.
Q.9 Determine the reinforcements required for a rectangular section for the following data :
Size of beam = 400 ´ 650
Grade of concrete = M 25,
Grade of steel = Fe 415
Shear force, V = 75 kN,
Torsional moment, T = 30 kN-m
Bending moment, M = 75 kN-m
Clear cover = 20 mm
Use working stress method of design.
Q.10 An overhead Intze type water tank is to be designed for a capacity of 650 kl for a staging height above GL of 18 m. Design parameters are as follows :
Bearing capacity of soil = 250 kN/m2
fck = 25 N/mm2 for tank and staging
fy = 415 N/mm2 for tank and staging.
Q.1 (a) State different types of reinforcement. Also describe the advantages of steel reinforcement.
(b) Describe the process diagram of concrete.
Q.2 (a) Explain different chemical ingredients of cement and their functions.
(b) Draw a flow chart to show the important steps in the manufacture of cement by dry process.
Q.3 (a) Discuss the merits and demerits of using rounded and angular aggregate.
(b) Describe the effect of shape/texture of aggregate on the strength of concrete.
Q.4 (a) Explain the various factors responsible for segregation of concrete.
(b) Discuss the requirement of water for hydration of cement.
Q.5 (a) Explain the various precautions which must be observed for storing the cement bags in stacks.
(b) Discuss the important guidelines for storing of aggregates on sites.
Q.6 (a) Describe the safety measures that must be observed during transportation of concrete.
(b) What is finishing of concrete? Explain different methods of finishing of concrete.
Q.7 (a) Explain the advantages and limitations of prestressed concrete.
(b) Discus the various problems encountered in cold weather concreting.
Q.8 (a) Explain the objectives of mix design of concrete.
(b) What do you mean by yield of concrete? Describe the methods which may be used to obtain exact value of yield of concrete.
Q.9 Write short notes on the following :
(i) Measurement of workability of concrete
(ii) Aggregate Abrasion Value
(iii) Handling of vibrators
(iv) Mass concrete
Q.10 Differentiate between the following :
(i) Volume Batching and Weigh Batching
(ii) Initial and Final setting of cement
(iii) Flaky and Elongated aggregates