Civil Engineering Interview Questions

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As per thumb rule cement required per 1 cum of M20 concrete is 411Kg/cum(1.57/5.5=0.285cum of cement i.e 0.285*1440=411Kg).But as per PWD rate analysis cement required is 347Kg/cum.the difference is 64Kg.This kind of difference is coming every grade of concrete.Can you give perfect suggestion regarding this.

What all are important things keep in mind while designing and executing the water storage tank works?

Design a built-up column carrying an axial load of 1200 KN. Its length is 8m and it is effectively held in position at both ends and restrained against rotation at one end. Assume yield stress of 250 mpa

859) Design a gussetted base for a column section consisting of one sc 250 with two cover plates 300 x 25 mm carrying an axial load of 2500 KN. The S.B.C. of soil is 250 KN/m2 and the permissible bearing pressure on concrete is 4000 KN.

885Design a cantilever slab to carry a live load of 2000 N/m2. The overhang of the slab is 1.20m. b) A slab over a room is 4.75m x 4.75m. The edges of the slab are simply supported and the corners are not held down. The live load an the slab is 300 Kg/m2. The slab has a bearing of 15cm. On the supporting walls. Design the slab as per Rankine - Grashoff theory. Assume weight of R.C.C. = 2400 Kg/m2.

1525A doubly reinforced concrete beam is 25 cm wide and 50cm deep to the centre of tension reinforcement. The centre of compression is steel is 5cm from the compression edge. The areas of the compression and the tension steel are 10.16cm2 and 12.56 cm2 if m=18 and the bending moment at the section is 7,000,000 N-cm. Calculate the stress in concrete and steel.

913Design a reinforced concrete combined footing (rectangular) for two columns located 3.60 metres apart. The overall sizes of the columns are 40cm x 40cm and 69cm x 60cm and the loads on them are 1000 kn and 1500 kn respectively. The space available for the width of the footing is restricted to 180cm. The S.B.C. of the soil is 280 kn/mm2 use M15 concrete.

1454Design a cantilever type retaining wall to retain sand for 4m above the ground. The sand fall slopes at the rate of 1 vertical to 2 horizontal. The weight of sand is 18000 N/m3, the angle of repose being 30. The safe bearing capacity of the soil is 200 kn/m2 at 1/25m below the ground level. Use m 15 concrete mix.

1609Design an underground tank of internal dimensions 6m x 3m x 3m. The soil surrounding the tank always remains dry. The tank shall be provided with a roof slab. The soil weighs 16000 N/m3 having an angle of repose of 30.

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Un-Answered Questions { Civil Engineering }

How to do rate analysis for concrete work including shuttering work?

can any one tell me in detail footing estimation .. i am new here in dubai so facing lots of problem...

How much river sand contain the 6 & 10 wheeler truck? Or Maximum sand that any type of truck carry?

Could you please give me an answer to the mixing proportion of concrete M1 grade (sterngth of 1 MPa)?

what is derating factor in cable? what does it mean if derating factor is high/low in terms of thermal resistivity of soil?

for pretensioning which will yield first and same for post tensioning?

Does degree of bend of rebars has any effect on strength of the member? For example- if a beam is designed with 45 degree bent up bar with respect to architechtural needs and is not 45 in practical so will there be any reduction in the strength of member?

How much cement,sand,bricks and water needed for 1square metre brick work?

what is the water cement ratio? how to calculate it? list the wt. of constructions materials including concrete both ordinary and light wt. concrete

I would like to get the formula How can i calculate the productivity of a mason in terms of brick laying and plaster. i have 6000 Sqmt of interlock laying work i want to calculate - how many masons required to do the job - in how many days can it be done - what will be the production rate in 8 hours shift/ per mason if i can get some excell sheet , it will really help me in my calculations

Is it necessary to apply tack coat over the primecoat. IF not what happens.answers other than 1.to superimpose the next layer(2) to adhere the layers so as to form homogenity.

que.is ideal size of bricnk use in india,joint size of mortar in massinary ,how many bricks used in 1cum.how to test at site.what is the possition of marka used in bricks?

Process of pcc in wateredug

How can I make justification between using concrete grade c35 compare c37?

Can anybody explain with the help of sketeches that what are 2legged , four legged & 6legged stirrups and how to calculate cut length of diamond ring(stirrups)?