DCC Infra Projects Highway Engineer Interview Questions, Process, and Tips

CTSB and GSB are different types of aggregates used in highway engineering.

• CTSB stands for Crushed to Specified Breakdown and GSB stands for Granular Sub Base.

• CTSB is a type of aggregate where the particles are crushed to a specified size and shape, while GSB is a layer of granular material used as a base for pavement construction.

• CTSB is typically used in the construction of flexible pavements, while GSB is used as a ...read more

Membranes are used in highway engineering for various purposes such as waterproofing, erosion control, and filtration.

• Membranes are used for waterproofing to prevent water from seeping into the pavement layers.

• They are also used for erosion control to protect slopes and embankments from erosion caused by water runoff.

• Membranes can be used for filtration to separate different layers of soil or aggregate materials in roa...read more

Engineering work at site involves planning, designing, and overseeing construction projects.

• Surveying and site investigation to gather data

• Designing structures and infrastructure

• Ensuring compliance with regulations and safety standards

• Supervising construction activities

• Quality control and project management

• Example: Designing a highway interchange, overseeing bridge construction

Hard shoulders are provided on highways for emergency stopping, breakdowns, and to improve safety.

• Hard shoulders provide a safe area for vehicles to stop in case of emergencies or breakdowns

• They help reduce the risk of accidents by providing a designated stopping area

• Emergency vehicles can use hard shoulders to reach incidents quickly and safely

• Hard shoulders also allow for easier maintenance and construction work on t

The density of CTB (Cement Treated Base) varies depending on the mix design and compaction level.

• The density of CTB is typically measured in pounds per cubic foot (lb/ft^3) or kilograms per cubic meter (kg/m^3).

• Higher compaction levels result in higher densities of CTB.

• The density of CTB can range from 120 to 140 lb/ft^3 (1920 to 2240 kg/m^3) depending on the mix design and compaction.

• Density tests are commonly conduct...read more

There are several types of rollers used in highway engineering for compaction purposes.

• Vibratory rollers

• Smooth wheeled rollers

• Pneumatic tired rollers

• Sheepsfoot rollers

• Grid rollers