Dara Engineering & Infrastructures Assistant Engineer - Civil Interview Questions, Process, and Tips

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.