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Construction Engineering - Dec 18
Civil Engineering (Semester 8)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1. Answer the following questions:
1.a.
What are the factors affecting the economic life of equipment.
(5 marks)
11622
1.b.
What are the methods of dust controlling in tunnel excavation.
(5 marks)
00
1.c.
Define and differentiate Standard equipment and Special equipment.
(5 marks)
9859
1.d.
Write a short note on slip form.
(5 marks)
8181
2.a.
Determine owning and operating cost per hour for an excavator from the following data:
(10 marks)
8155
Purchased cost = Rs.35 lacs
Useful life = 15 years (2500 hours/year)
Engine capacity = 50 HP
Salvage value = 10% of purchase cost
Investment cost = 12% average annual investment
Lubrication cost = 20% of fuel cost
2.b.
What are commonly used compacting equipment in construction industry?Explain Pneumatic tyred roller with neat sketch with respect to components, working, suitability and factors affecting its performance.
(10 marks)
00
3.a.
What are the different types of crushers used for production of aggregate?
(10 marks)
9879
Describe gyratory crusher with neat sketch stating components and it’s working.
3.b.
Enlist the various excavating equipment. Explain with neat sketch the Trenching machine in respect of its working, suitability and factors affecting the performance.
(10 marks)
00
4.a.
What do you understand by ground improvement? What properties of ground are improved by stone column? Discuss the ground improvement technique by Stone column with a neat sketch stating diameter, depth, spacing and materials of columns.
(10 marks)
9833
4.b.
Enlist the different methods of tunneling in soils and rocks. Explain the working of tunnel boring machine.
(10 marks)
9837
5.a.
What are pile driving hammers? Explain the working of Diesel Hammer with neat sketch.
(10 marks)
9862
5.b.
What is mass concrete? What are the effects of mass concreting during and after placing? What precaution will you take for mass concreting?
(10 marks)
8183
6. Write short notes on (any four)
6.a.
Vacuum concreting
(5 marks)
9827
6.b.
Sand drain
(5 marks)
9861
6.c.
Balancing of equipment
(5 marks)
9882
6.d.
Shaft in tunnel
(5 marks)
11623
6.e.
Cladding types
(5 marks)
9822
6.f.
Sheep foot roller
(5 marks)
9866
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