Civil Engineering Interview Questions and Answers
Question - 21 : - What is Shear slump ?
Answer - 21 : -
Shear slump implies that the concrete mix is deficient in cohesion. Consequently, it may undergo segregation and bleeding and thus is undesirable for durability of concrete.
Question - 22 : - Why is concrete weak in tension?
Answer - 22 : -
Concrete is made up of collection of materials (several aggregate types, cement, pozzolans, water, air…), which are stick together with a cement paste. The “interface” zone is the weakest link in the structure. When compressing, that interface only serves to transfer compressive stresses from one aggregate to the next. That does not require exceptional strength.
Under tension, the aggregates are trying to pull away from each other, and the glue is what holds the whole system together. Since it is significantly weaker than the aggregates, it is where the failure starts at much lower stresses.
Question - 23 : - What is grouting?
Answer - 23 : -
Grout is a fluid form of concrete which is used to fill the voids.
Question - 24 : - What is the recommended slump for column ?
Answer - 24 : -
75 to 125 mm
Question - 25 : - The bearing capacity of granite is generally ?
Answer - 25 : -
30 to 35 kg/cm 2
Question - 26 : - What are the specifications of tamping rod used in cube filling for cube test ?
Answer - 26 : - According to the IS code 2386, a 16 mm steel rod with rounded edge
Question - 27 : - What is the minimum curing period ?
Answer - 27 : -
IS 456 – 2000 recommends that curing duration of concrete must be at least 7 days in case of Ordinary Portland Cement, at least 10 days for concrete with Mineral admixtures.
It also recommends that the curing duration should not be less than 10 days for concrete of OPC exposed to dry and hot weather conditions and 14 days for concrete with mineral admixtures in hot and dry weather.
Question - 28 : - What are the functions of column in a building ?
Answer - 28 : -
Column is a vertical member in building whose Primary function is to support structural load and transfer it through beams. Upper columns transfers the load to the lower columns and finally to the ground through footings.
Question - 29 : - What are the uses of Groynes ?
Answer - 29 : -
They prevent, or slow down erosion, and stop the longshore drift. This, however, can have bad knock-on effects somewhere near.
Question - 30 : - What is the initial and final setting time of ideal cement mix?
Answer - 30 : -
Initial setting time for ideal cement mix is around 30 minutes for almost all kind of cements. For masonry cement it can be 90minutes. Final setting time of ideal cement mix should be 10 hours at max. For masonry cement it shouldn’t exceed 24hours