Civil engineering Interview Questions



Q01. What is the Compressive Strength of brick?
A.      Second class brick-70kg/cm2
          First class brick-105kg/cm2
          Fire brick-125kg/cm2

Q02. What is grouting?
A.     Grout is a fluid form of concrete which is used to fill the voids.

Q03. What is the Unit Weight of concrete?
A:-  The unit weight of concrete depends on the type of aggregates and amount of voids. As per IS : 456-200 Unit weight of PCC is 24KN/m3 and RCC is 25KN/m3

Q04. What do you mean by the moment of inertia?
A.      A quantity expressing a body’s tendency to resist angular acceleration, which is the sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation.

Q05. What is the unit weight of Steel?
A.   The unit weight of Steel is 78.5KN/m3

Q06. What’s the difference between one-way slab and two-way slab?
A.   One way slab: Ratio of Longer Span / Shorter span > 2
       Two way slab: Ratio of Longer span/ shorter span <= 2

Q07. What are the Nominal Concrete Mix proportions for different grades:
A.    Important: M20-1:1.5:3, M7.5- 1:4:8,
        Less imp: M5- 1:5:10 , M25- 1:1:2, M30-1:1:3 (Cement:Sand:aggregate)

Q08. What’s the length of rise and tread in Stair case?
A.     Rise – 150mm to 200mm, Tread – 250mm to 300mm

Q09. What is ductility?
A.   Ductility is the Ability to deform under tensile stress.

Q10. What do you mean by One storeyed, Two storeyed building?
A.   The building which has two floors is called two storeyed building.

Q11. How to find the weight of steel bar used in reinforcement?
A.   Weight of Bar in kg/m = D square/162.2   D- Dia of bar in mm

Q12. What is flat slab?
A.   The slab which is supported on columns (Flab slab don’t have beams)

Q13. What’s the height of each floor?
A.   3m

Q14. What is Seepage?
A.      Slow percolation of water through soil is called Seepage.

Q15. What is a crank length in the slab?
A.     The crank length in Slab is 0.42 D. Where D is Depth of Slab- Top cover – Bottom Cover. 

Q16. What is allowable moisture content in Fine aggregate for the concrete mix?
A.     We won’t use the aggregate if its moisture content is more than 5%.

Q17. What’s the slope of Staircase?
A.     As per IS 456, the slope or pitch of stair should be between 25 degrees to 40 degrees.

Q18. What do you mean by segregation?
A.     Segregation is a separation of cement, sand from aggregate. This is caused due to Water cement ratio and  when concrete is poured about more than 1.5m

 

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