Larsen & Toubro Limited QA/QC Civil Engineer Interview Questions and Answers

The ratio of M25 concrete is 1:1:2 (cement:sand:aggregate)

• The ratio of M25 concrete is 1:1:2, which means 1 part cement, 1 part sand, and 2 parts aggregate.

• This ratio is commonly used in construction for medium strength concrete.

• For example, to make 1 cubic meter of M25 concrete, you would need 1/4 cubic meters of cement, 1/4 cubic meters of sand, and 1/2 cubic meters of aggregate.

As an Assistant Engineer - Civil at my previous company, my responsibilities included assisting senior engineers in project planning, design, and construction.

• Assisted senior engineers in project planning and design

• Participated in site visits and inspections

• Prepared project reports and documentation

• Collaborated with team members and contractors

• Ensured compliance with safety regulations and quality standards

Managed site operations, coordinated with contractors, ensured compliance with safety regulations.

• Managed day-to-day site operations

• Coordinated with contractors for timely completion of projects

• Ensured compliance with safety regulations and quality standards

• Prepared progress reports and communicated with stakeholders

• Implemented cost-saving measures without compromising quality

The name of the client is XYZ Construction Company.

• XYZ Construction Company is a well-known construction firm in the region.

• They have completed several projects in the past, including the construction of a new office building in downtown.

• The client has a reputation for high-quality work and timely project completion.

Lap length and development length for hoop, grade of concrete, and HDPE pipe are specified in code.

• Lap length for hoop reinforcement is specified in IS 456:2000 and varies based on the diameter of the bar and the grade of concrete.

• Development length is the length of the bar required to transfer the stress from the bar to the surrounding concrete and is also specified in IS 456:2000.

• The grade of concrete determines the ...read more

Hydration process is the chemical reaction between cement and water which results in the hardening of concrete.

• Hydration process starts as soon as water is added to cement.

• The reaction produces heat and causes the mixture to harden and gain strength.

• The process continues for weeks and even months, resulting in a stronger and more durable concrete.

• The amount of water used in the mixture affects the hydration process and...read more

Concrete strength depends on various factors.

• Water-cement ratio

• Type and quality of cement

• Aggregate size and shape

• Curing conditions

• Mix design

• Age of concrete

• Temperature and humidity

• Presence of admixtures

Water is added to concrete mixer to make the mixture more workable and to achieve the desired consistency.

• Water is added to hydrate the cement and activate the chemical reaction that causes it to harden

• The amount of water added affects the strength and durability of the concrete

• Too much water can weaken the concrete and cause cracking

• The water should be added gradually and mixed thoroughly to ensure even distribution

• Ot...read more