Civil engineer basic interview Question 2024
What is a crank length in the slab?
The crank length in Slab is 0.42 D.
Where D = Slab thickness – (Top cover + Bottom Cover)
What is allowable moisture content in Fine aggregate for the concrete mix?
We won’t use the aggregate if its moisture content is more than 5%.
What is the Unit Weight of concrete?
As per IS: 456-2000 Unit weight of Plain cement concrete is 24KN/m3 and Reinforced cement concrete is 25KN/m3
What’s the slope of Staircase?
As per IS 456, the slope or pitch of stair should be between 25 degrees to 40 degrees
What is the Compressive Strength of brick?
- Second class brick-70kg/cm2
- First class brick-105kg/cm2
- Fire brick-125kg/cm2
Describe briefly the various methods of concrete curing.
Curing is the process of maintaining temperature and moisture conditions for hardening of concrete are known as curing. This process of curing helps fresh concrete from shrinkage:
(a) Spraying of water: In this method, water is sprinkled over the concrete structures, Ex: columns, walls, etc
(b) Wet covering of surface: This can be cured by using the wet gunny bags or straw
(c) Ponding: the horizontal surfaces including the slab and floors can be cured by stagnating the water for a longer time.
(d) Steam curing: This method pf curing is used in prefabricated concrete units. steam is passed over the units that are under closed chambers. This allows faster curing and results in faster recovery.
(e) Application of curing compounds: compounds having calcium chloride can be applied on the curing surface. This keeps the surface wet for a long time.
What is grouting?
Grout is a fluid form of concrete which is used to fill the voids.
How do you find the weight of steel bar used in reinforcement?
Weight of Bar in kg/m = D 2 /162.2 { D- Diameter of bar in mm }
What’s the difference between one-way slab and two-way slab?
One way slab: Ratio of Longer Span / Shorter span > 2 Two way slab: when the Ratio of Longer span / shorter span <= 2