10+ Civil Engineer 1 Interview Questions and Answers

The standard size of brick according to IS Code is 190mm x 90mm x 90mm.

• The size of brick is specified in IS 1077-1976.

• The standard size of brick is 190mm x 90mm x 90mm.

• This size is commonly used in construction in India.

• Bricks of different sizes can also be used depending on the specific requirements of the project.

DPC stands for Damp Proof Course, which is a layer of waterproof material used in construction to prevent moisture from rising.

• DPC is typically made of materials such as bitumen, asphalt, or plastic.

• It is installed horizontally in walls and floors at a height of at least 150mm above ground level.

• DPC prevents dampness and moisture from rising up through the walls and causing damage to the structure.

• It is an essential component of modern construction and is required by building...read more

Grades of concrete refer to the strength of the concrete mix.

• The most commonly used grades of concrete are M10, M20, M30, M40, M50, and M60.

• The number after 'M' represents the compressive strength of the concrete in megapascals (MPa).

• For example, M20 grade concrete has a compressive strength of 20 MPa.

• Higher grade concrete is used for structures that require greater strength, such as bridges and high-rise buildings.

Cover blocks are used to maintain the distance between the reinforcement steel and the formwork in RCC work.

• Cover blocks come in different sizes depending on the thickness of the concrete cover required.

• For example, for a 20mm cover, a 20mm cover block is used.

• For a 25mm cover, a 25mm cover block is used.

• The size of the cover block should be such that it can withstand the weight of the reinforcement steel and the concrete.

• Cover blocks can be made of different materials such a...read more

Substructure refers to the part of a structure below ground level while superstructure refers to the part above ground level.

• Substructure includes foundation, basement, and other underground elements

• Superstructure includes columns, beams, walls, and roof

• Substructure provides support and stability to the superstructure

• Superstructure carries the load of the building and provides usable space for occupants

• Examples of substructure: piles, footings, retaining walls, and undergroun...read more

Development length of steel is the length of rebar required to transfer stress from steel to concrete.

• It is the length of rebar required to transfer stress from steel to concrete

• It is dependent on the diameter of the rebar and the strength of the concrete

• It is calculated using the formula Ld = (phi x fy x As) / (4 x f'c x sqrt(fy))

• Ld is the development length, phi is the reduction factor, fy is the yield strength of the steel, As is the cross-sectional area of the steel, and ...read more

There are several types of walls, including load-bearing, non-load bearing, curtain, and retaining walls.

• Load-bearing walls support the weight of the structure above them, while non-load bearing walls do not.

• Curtain walls are typically made of glass and do not support any weight.

• Retaining walls are used to hold back soil or other materials.

• Other types of walls include partition walls, fire walls, and soundproof walls.

Standard size of brick is 190mm x 90mm x 90mm.

• The standard size of brick varies from country to country.

• In the UK, the standard size of brick is 215mm x 102.5mm x 65mm.

• In the US, the standard size of brick is 203mm x 92mm x 57mm.

• Bricks can also come in different shapes and sizes for specific purposes.

Quantity of concrete refers to the amount of concrete required for a particular project.

• It is measured in cubic meters or cubic feet.

• The quantity of concrete required depends on the dimensions of the project.

• It is calculated by multiplying the length, width, and height of the project.

• For example, a 10 ft x 10 ft x 6 in slab would require 0.42 cubic yards of concrete.

Lap length is the amount of overlap between two reinforcing bars in a concrete structure.

• It is necessary to provide lap length to ensure the transfer of stresses from one bar to another.

• The lap length depends on the diameter of the bars, the grade of steel, and the type of structure.

• For example, in a beam, the lap length is usually 50 times the diameter of the bar.

• In columns, the lap length is usually 40 times the diameter of the bar.

• Lap length is important for the structural...read more

RCC grades differ based on the strength of concrete required for a particular construction project.

• RCC grades range from M10 to M80, with M10 being the weakest and M80 being the strongest.

• The grade of RCC required depends on the load-bearing capacity and durability needed for the structure.

• For example, a bridge would require a higher grade of RCC than a residential building.

• The strength of RCC is determined by the ratio of cement, sand, and aggregate used in the mix.

• Higher gr...read more

There are several types of cement used in construction, each with unique properties and applications.

• Ordinary Portland Cement (OPC) is the most commonly used type of cement.

• Rapid Hardening Cement (RHC) sets and hardens quickly, making it ideal for precast concrete.

• Low Heat Cement (LHC) generates less heat during hydration, reducing the risk of cracking.

• Sulfate Resistant Cement (SRC) is used in areas with high sulfate content in soil or water.

• White Cement is used for decorativ...read more