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Civil Site Engineering Interview

> Concrete cube filled in how many layers = 3

> Slump cone filled in how many layers = 4

> Volume of one bag of cement = 0.0347 meter cube or 1.23 cubic feet

> Name of machine used for compression test = Universal Testing Machine (UTM)

> What are the test carried on concrete = 1- Slump Test for Workability 2- Compressive test for Strength 3- Rebound Hammer Test 4-

> Compressive strength of Bricks = First class brick = 105 kg/cm2, Second class brick = 70 kg/cm2, Fire brick = 125 kg/cm2

> Curing Method = Sprinkling water, wet covering of surface (gunny bags), ponding, chemicals, steam

> Density of Materials (kg/N-m3) = Steel 7850, RCC 2420, Concrete 2400, Cement 1440, Cement Mortar 2080, Sand 1450-1550, Bricks 1600-1920, Agreegates     , Water 1000, Ice 920

> M25 1:1:2, M20 1:1.5:3, M15 1:2:4, M10 1:3:6

> In Simply Supported beam, bottom is Tension zone where as top is Compression zone. Hence we provide more steel at bottom than the top whereas in case of Cantilever beam, Tension zone is at top & Compression zone is at bottom. We also provide curtail bars in Tension zone if necessary.

> Cover (mm) = Column 40, Beam 25, Slab 20, Footing 50

> Needle Vibrator = 25mm, 40mm, 60mm. Should be keep in concrete for 5-10 seconds

> Chair Bar made of scrap steel, 12mm diameter in 1 Square Meter area

> Minimum limit of Silt content 8%

> Formwork = 1- Conventional Formwork = Ply wood+Battens 2- MS Steel = Angle Plates 3- System = Aluminum (MIVAN)

> PCC is 75-100mm thick, M 7.5 - M 10, also called Lean Concrete

> Binding Wire also called as Annealed Wire. Size 16 gauge or 1.6mm diameter and not less than 20 gauge or 0.9mm diameter. Approximately 1% of Binding Wire required of total steel.

> Measurement of plaster will be taken before plastering from Brick wall to Brick wall

> In residential building, minimum distance between two column is 2-3 meter & maximum distance is 4-5 meter

> IRC = Indian Road Congress

> 5% of wastage in Marble & Tile

> In English bond, one line Header & Next line is Stretcher where as in Flemish Bond, Header & Stretcher is Alternate in one line.

> Chicken Mesh in Brick Wall 6 inches width.

> Due to Maximum stress (moment), never ever provide Lap in beam- column junction.

> In Lap junction, ties spacing less (100-150mm c/c) otherwise spacing should be high (200mm c/c). In column, we called stirrups as ties.

>Water absorption of brick should not be more than 20% by its weight

> Dowel bars minimum 12mm diameter

> Free fall of concrete is 1.5 Meter

> Electrical conduit shall not run through Column

> Nominal mix upto M25 and above it should be Design mix

> Angular aggregate better than Rounded aggregate

> Size of Coarse Aggregate is 4.5 mm to 80 mm

> In simply supported beam, bending moment maximum at Center

> 1 square metre = 10.76 square feet
   1 cubic meter = 35.31 cubic feet