Jacobs Engineering Group 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

Answering questions related to concrete mix, IS codes, cement setting time, clear cover, transition curve, supervisor elevation, pavement design, and beam cover.

• Mix ratio of concrete is the proportion of cement, sand, and aggregate used in the mixture.

• IS codes are Indian Standards codes that provide guidelines for construction materials and practices.

• Setting time of cement is the time taken by cement to harden and gain...read more

LOD stages in BIM refer to the Level of Development which defines the amount of detail and accuracy of a model at different stages of a project.

• LOD 100: Conceptual design with basic massing and spatial relationships

• LOD 200: Generalized elements with approximate quantities, size, shape, location, and orientation

• LOD 300: Specific elements with accurate quantities, size, shape, location, and orientation

• LOD 400: Detailed e...read more

Bracing should be added in the weak axis direction to provide stability and prevent buckling.

• Bracing should be added in the weak axis direction to prevent buckling.

• Bracing helps to stabilize the structure and distribute loads more efficiently.

• Examples of bracing in steel structures include diagonal bracing, cross bracing, and portal bracing.

Different checks in footing include bearing capacity check, settlement check, sliding check, and overturning check.

• Bearing capacity check ensures the soil can support the load without failure.

• Settlement check ensures the footing settles within acceptable limits.

• Sliding check ensures the footing does not slide on the soil.

• Overturning check ensures the footing does not overturn due to lateral forces.

One way shear occurs in footings when load is applied in one direction, while two way shear occurs when load is applied in two directions.

• One way shear typically occurs in rectangular footings where the load is applied in one direction.

• Two way shear occurs in square footings or when the load is applied in two directions.

• One way shear is calculated using the formula Vc = 0.5 * f'c * b * d, while two way shear is calcula

I have worked on various types of structures including commercial buildings, residential homes, bridges, and industrial facilities.

• Commercial buildings

• Residential homes

• Bridges

• Industrial facilities