Dara Engineering & Infrastructures Interview Questions, Process, and Tips

OHT Structural drawing refers to the detailed plans and diagrams for an overhead tank structure.

• OHT Structural drawing includes detailed dimensions, materials, and construction methods for the overhead tank.

• It also shows the layout of the tank, including inlet and outlet pipes, supports, and access points.

• These drawings are essential for ensuring the structural integrity and proper functioning of the overhead tank.

• Engi...read more

Water treatment plants are facilities that purify water for human consumption or industrial use.

• Water treatment plants remove contaminants from raw water sources such as lakes, rivers, or groundwater.

• Processes involved in water treatment include coagulation, sedimentation, filtration, and disinfection.

• Common types of water treatment plants include conventional treatment plants, membrane filtration plants, and desalinat...read more

Standard size of bricks is 190mm x 90mm x 90mm and nominal size is 200mm x 100mm x 100mm.

• Standard size of bricks: 190mm x 90mm x 90mm

• Nominal size of bricks: 200mm x 100mm x 100mm

• Standard size is the actual size of the brick while nominal size includes the mortar joint thickness

• Bricks are commonly used in construction for walls, pavements, and other structures

Types of footing include spread footings, mat foundations, pile foundations, and drilled caissons.

• Spread footings are used for shallow foundations and distribute the load over a larger area.

• Mat foundations are used for heavy loads and cover the entire area under a structure.

• Pile foundations are used when soil conditions are poor and transfer loads to deeper, more stable layers.

• Drilled caissons are used in areas with hi...read more

FE415 is a grade of steel commonly used in construction, indicating the yield strength of the material.

• FE415 stands for 'Fe' - iron, '415' - yield strength in MPa

• It is a commonly used grade of steel in construction for reinforced concrete

• Higher the grade number, higher the yield strength of the steel

• FE415 steel bars are widely used in building construction for beams, columns, slabs, etc.

HDPE IS code refers to the Indian Standard code for High Density Polyethylene.

• HDPE IS code stands for Indian Standard code for High Density Polyethylene.

• The IS code for HDPE is IS 4984:1995.

• It specifies the requirements for high-density polyethylene pipes for use in water supply, irrigation, and sewerage.

Brick tests performed at site include compressive strength test, water absorption test, efflorescence test, etc.

• Brick compressive strength test is conducted to ensure the bricks meet the required strength standards.

• Water absorption test determines the porosity of bricks and their ability to withstand moisture.

• Efflorescence test checks for the presence of white salt deposits on the surface of bricks, indicating poor qua...read more

The number of bricks in one cubic metre depends on the size of the bricks being used.

• The number of bricks in one cubic metre will vary based on the dimensions of the bricks.

• Standard size bricks (230mm x 110mm x 76mm) will require approximately 500 bricks to make up one cubic metre.

• Larger or smaller bricks will result in a different quantity needed to fill one cubic metre.

Cement tests at the site are conducted to ensure quality and strength of the cement used in construction projects.

• Cement tests include checking for fineness, setting time, soundness, and compressive strength.

• These tests are important to ensure the durability and performance of the concrete.

• Common tests include the Le Chatelier test, Vicat test, and compressive strength test.

• Results of these tests help in determining th...read more

Field test of cement involves checking its quality and properties on-site.

• Check the color and texture of the cement to ensure it is consistent and free from lumps.

• Perform the 'thumb test' by pressing a small amount of cement between fingers - good quality cement should feel smooth and not leave any residue.

• Use the 'float test' by placing a small amount of cement in a bucket of water - good quality cement should float f...read more

Typically, 6-7 bags of cement are used in one cubic meter of concrete.

• The amount of cement needed can vary depending on the mix design and application.

• A common ratio for concrete is 1:2:4, which means 1 part cement, 2 parts sand, and 4 parts gravel.

• For a 1 cubic meter of concrete with a 1:2:4 ratio, around 6-7 bags of cement are usually used.

I have experience working with HDPE and following code regulations.

• I have worked with HDPE in previous engineering projects.

• I am familiar with the code regulations for HDPE.

• I have successfully implemented HDPE solutions in the past.

• I have knowledge of the properties and applications of HDPE.

• I have experience in troubleshooting and resolving issues related to HDPE.

The size of the pump house and the amount of material required depend on the specific requirements and capacity of the pump system.

• The size of the pump house will depend on the number and size of the pumps to be installed.

• The material required will depend on the construction materials chosen for the pump house.

• Factors such as the location, environmental conditions, and accessibility may also influence the size and mate...read more

The ratio of M20 refers to the mix proportion of concrete with a compressive strength of 20 megapascals (MPa).

• M20 is a commonly used grade of concrete in construction.

• The ratio of M20 is 1:1.5:3, which means 1 part cement, 1.5 parts sand, and 3 parts aggregate by volume.

• This ratio determines the strength and workability of the concrete mix.

• For example, to make 1 cubic meter of M20 concrete, you would need 1 part cement

The height of a boundary wall depends on various factors such as its purpose, location, and local regulations.

• The height of a boundary wall is typically determined by its purpose. For example, a residential boundary wall may be around 6 feet tall for privacy and security.

• The height of a boundary wall may also depend on its location. In urban areas, there may be height restrictions imposed by local authorities.

• Local reg...read more