Civil Engineering Important Interview Questions with Answers Check Here :- Hi Every One Here We are Coming With a New Topic as that we are here providing the 25 Important Civil Engineering Interview Questions with Answers Candidates who are in Search of the Civil Job or Civil Govt Jobs in the Department of State or Central across India,as Here the Civil Interviews are the Most Typical and the Most Critical part of a Civilian Career of Any Student that who have completed their Civil Engineering,Interview is a Critical Part and You will Study Hard and Get to Score Good Marks and then You apply for the Latest Civil recruitment and Civil Jobs.As However the Candidates who are going to appear for an Interview there will be some Nervous to attend it and you are never Confident about weather you will be selected or not.Most of the Students Fear that the Interview Questions will be asked and are very tough and they will be loose their confident to attain the Interview. Especially when you are in the Preparing for an Interview. So, Here today we are here with some important civil engineering interview questions that will help you with your job Guidance and Process,Whether you are a student, teacher or a professional, these civil engineering interview questions with answers will help you. For More Information and the Latest Civil Recruitment Can Check Here.
Civil Engineering Interview Question with Answers
1. What are the steps involved in the concreting process, explain?
Answer: The major steps involved in the process of concreting are as follows:
3. Transporting and placing of concrete
1.Batching: The process of measurement of the different materials for the making of concrete is known as batching. batching is usually done in two ways: volume batching and weight batching. In case of volume batching the measurement is done in the form of volume whereas in the case of weight batching it is done by the weight.
02.Mixing: In order to create good concrete the mixing of the materials should be first done in dry condition and after it wet condition. The two general methods of mixing are: hand mixing and machine mixing.
03.Transportation and placing of concrete: Once the concrete mixture is created it must be transported to its final location. The concrete is placed on form works and should always be dropped on its final location as closely as possible.
04.Compaction of concrete: When concrete is placed it can have air bubbles entrapped in it which can lead to the reduction of the strength by 30%. In order to reduce the air bubbles the process of compaction is performed. Compaction is generally performed in two ways: by hand or by the use of vibrators
02.Describe briefly various methods of concrete curing.
Answer: Curing is the process of maintaining the moisture and temperature conditions for freshly deployed concrete. This is done for small duration of time to allow the hardening of concrete. The methods that are involved in saving the shrinkage of the concrete includes:
(a) Spraying of water: on walls, and columns can be cured by sprinkling water.
(b) Wet covering of surface: can be cured by using the surface with wet gunny bags or straw
(c) Pounding: the horizontal surfaces including the slab and floors can be cured by stagnating the water.
(d) Steam curing: of Pre-fabricated concrete units steam can be cured by passing it over the units that are under closed chambers. It allows faster curing process and results in faster recovery.
(e) Application of curing compounds: compounds having calcium chloride can be applied on curing surface. This keeps the surface wet for a very long time.
03.What DO YOU UNDERSTAND BY PRESET DURING THE Installation Process OF BRIDGE BEARINGS?
Answer: During the installation of bridge bearings the size of the upper plates is reduced to save the material costs. This process is known as preset. Generally the upper bearing plate comprises of the following components:
01.Length of bearing
02.x irreversible movement.
03.x reversible movement.
The bearing initially is placed right in the middle point of the upper bearing plate. No directional effects of irreversible movement is considered. But since the irreversible movement usually takes place in one direction only the displaced direction is placed away from the midpoint. In such cases the length of the upper plate is equal to the length of the length of the bearing + irreversible movement + 2 x reversible movement. During the installation of bridge bearings the size of the upper plates is reduced to save the material costs. This process is known as preset. Generally, the upper bearing plate comprises the following components.
04.Why are steel plates inserted inside bearings in Elastomeric bearings?
Answer : For Elastomeric bearing to function as a soft spring, the bearing should be allowed for bulging laterally and the compression stiffness can be increased by limiting the amount of lateral bulging. To increase the compression stiffness of Elastomeric bearings, metal plates are inserted. After the addition of steel plates, the freedom to bulge is restricted and the deflection is reduced when compared with bearings without any steel plates under the same load. Tensile stresses are induced in these steel plates during their action in limiting the bulging of the Elastomer. This in turn would limit the thickness of the steel plates.
05.What reinforcements are used in the process of prestressing?
(i) Spalling reinforcement
Spalling stresses are established behind the loaded area of anchor blocks and this causes breaking away of surface concrete. These stresses are induced by strain incompatibility with Poisson’s effects or by the shape of stress trajectories.
(ii) Equilibrium reinforcement
Equilibrium reinforcement is required where there are several anchorages in which prestressing loads are applied sequentially.
(iii) Bursting Reinforcement
Tensile stresses are induced during prestressing operation and the maximum bursting stress occurs where the stress trajectories are concave towards the line of action of the load. Reinforcement is needed to resist these lateral tensile forces.
06.In the Design of Bridge Arguments What Considerations should Be Made to Select the Orientation of the Wing Walls ?
Answer: Some of the most common arrangements of wing walls in cases of bridge arguments are as follows:
Wing walls parallel to abutments: This method is considered to take least amount of time to build and is simple as well. But on the downside this method is not the most economical. The advantage of this type of design being that they cause the least amount of disturbance to the slope embankment.
Wing walls at an angle to abutments: This design method is considered to be the most economical in terms of material cost.
Wing walls perpendicular to abutments: The characteristic of this design is it provides an alignment continuous with the bridge decks lending a support to the parapets.
07.In case if concrete box girder bridges how is the number of cells determined?
Answer: When the depth of a box girder bridge exceed 1/6th or 1/5th of the bridge width then the design recommended is that of a single cell box girder bridge. But in case the depth of the bridge is lower than 1/6th of the bridge width then a twin-cell or in some cases multiple cell is the preferred choice. One should also note that even in the cases of wider bridges where there depths are comparatively low the number of cells should be minimized. This is so as there is noticeably not much improvement in the transverse load distribution when the number of cells of the box girder is higher than three or more.
08.In Case if concrete box girder bridges how is the number of cells determined?
Answer: When the Depth of a box girder bridge exceed 1/6th or 1/5th of the bridge width then the design recommended is that of a single cell box girder bridge. But in case the depth of the bridge is lower than 1/6th of the bridge width then a twin-cell or in some cases multiple cell is the preferred choice. One should also note that even in the cases of wider bridges where there depths are comparatively low the number of cells should be minimized. This is so as there is noticeably not much improvement in the transverse load distribution when the number of cells of the box girder is higher than three or more.
09. Why should pumping be not used in case of concreting works?
Answer: During the pumping operation the pump exerted pressure must overcome any friction between the pumping pipes and the concrete, also the weight of the concrete and the pressure head when the concrete is placed above the pumps. Since only water is pump able, all the pressure generated is by the water that is present in the concrete. The major problem due to pumping are segregation effects and bleeding. In order to rectify and reduce these effects, generally the proportion of the cement is increased in order to increase the cohesion , which leads to the reduction of segregation and bleeding. Also if a proper selection of the aggregate grading can vastly improve the concrete pump ability.
10.Why should curing not be done by Ponding and polythene sheets?
Ponding: This method of thermal curing is readily affected by weather condition (cold wind). Moreover, a large amount of water used has to be disposed off the construction sites after curing.
Polythene sheet: This method of curing is based on the principle that there is no flow of air over the concrete surface and thereby no evaporation can take place on top of the freshly concreted surface by provision of polythene sheets. However, it suffers from the demerit that polythene sheets can be easily blown off in windy condition and the performance of curing would be affected. Moreover, for water lost due to self-desiccation, this method cannot replenish these losses.