Megha Engineering & Infrastructures Assistant Engineer - Civil Interview Questions and Answers

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

The weight of steel bars can be calculated by multiplying the volume of the steel bar by its density.

• Calculate the volume of the steel bar by using the formula: Volume = (π * (Diameter)^2 * Length) / 4

• Determine the density of the specific type of steel being used

• Multiply the volume by the density to get the weight of the steel bar

Workability refers to the ease and ability of a material to be worked with and manipulated during construction.

• Workability is important in construction as it affects the ease of placing, compacting, and finishing concrete or other materials.

• Factors affecting workability include water content, aggregate size and shape, temperature, and admixtures.

• For example, a concrete mix with high workability will flow easily into fo...read more

Bar bending schedule is a document detailing the shape, quantity, length, and bending dimensions of steel bars used in construction.

• It is prepared by civil engineers to ensure proper placement and bending of reinforcement bars in concrete structures.

• Includes details such as bar mark, diameter, number of bars, length, shape codes, and bending dimensions.

• Helps in estimating the quantity of steel required for construction...read more

The density of steel bars is approximately 7850 kg/m^3.

• The density of steel bars is typically around 7850 kg/m^3.

• Density can vary slightly depending on the specific type of steel used.

• Density is a measure of mass per unit volume.

The mix ratio of grade M20 concrete is 1:1.5:3 (cement:sand:aggregate).

• Grade M20 concrete has a mix ratio of 1:1.5:3 (cement:sand:aggregate).

• This means for every 1 part of cement, 1.5 parts of sand and 3 parts of aggregate are used.

• For example, for a 1 cubic meter of M20 concrete, 0.5 cubic meters of sand and 1.5 cubic meters of aggregate are used.

A beam is a structural element that is designed to resist loads applied perpendicular to its longitudinal axis.

• Beams are commonly used in construction to support loads over a span.

• They can be made of various materials such as wood, steel, or concrete.

• Beams can be classified based on their shape, such as I-beams, H-beams, or T-beams.

• The design of a beam takes into account factors like span length, load requirements, and

King post and queen post are both types of trusses used in construction, with king post being a simpler design and queen post being a more complex design.

• King post is a simple vertical member in a truss, while queen post is a pair of vertical members connected by a horizontal member.

• Queen post trusses are stronger and can span longer distances compared to king post trusses.

• King post trusses are commonly used in small s...read more

Tension is a force that pulls or stretches an object.

• Tension is a type of mechanical stress that occurs when an object is pulled or stretched.

• It is a force that acts in the opposite direction of compression.

• Tension is commonly seen in structures like bridges and cables.

• Examples of tension include a rope being pulled taut or a rubber band being stretched.

Compression is the action of applying pressure to reduce the size or volume of an object or material.

• Compression is a force that squeezes or presses an object or material together.

• It is commonly used in civil engineering to test the strength of materials like concrete or soil.

• Compression can cause materials to deform or break if the force applied is too great.

• Examples of compression include the weight of a building pre...read more