100+ Afcons Infrastructure Interview Questions and Answers

Shrinkage cracks occur due to the volume reduction of concrete during the drying process.

• Shrinkage cracks are caused by the drying and shrinkage of concrete.

• As the water in the concrete evaporates, the volume of the concrete decreases, leading to cracks.

• These cracks are typically small and appear in a random pattern.

• Shrinkage cracks can also occur due to rapid drying or inadequate curing of concrete.

• Examples of shrinkage cracks include cracks in concrete slabs, walls, or pave...read more

Various tests are performed on concrete to ensure its quality and strength.

• Compression test to determine the compressive strength of concrete

• Slump test to measure the workability of concrete

• Water absorption test to determine the porosity of concrete

• Chloride permeability test to assess the durability of concrete

• Ultrasonic pulse velocity test to detect defects and cracks in concrete

• Rebound hammer test to estimate the strength of concrete

• Pull-out test to measure the bond strengt...read more

Fire is a chemical reaction that releases heat, light, and various gases.

• Fire is a rapid oxidation process that occurs when fuel (such as wood, paper, or gasoline) combines with oxygen and heat.

• It produces flames, smoke, and heat that can be dangerous to people and property.

• Fire can be caused by various sources, including electrical faults, cooking accidents, and arson.

• Preventing fires and knowing how to respond to them is crucial for safety.

• Firefighters use water, foam, and ...read more

A hazard is anything that has the potential to cause harm or injury to people, property, or the environment.

• Hazard can be physical, chemical, biological, or environmental

• Examples of hazards include fire, toxic chemicals, infectious diseases, and natural disasters

• Hazards can be identified through risk assessments and safety inspections

• Preventative measures can be taken to mitigate or eliminate hazards

Scaffolding is a temporary structure used to support workers and materials during construction or maintenance of buildings or other structures.

• Scaffolding is typically made of metal or wood and consists of platforms, braces, and supports.

• It is used to provide a safe working platform for workers at heights.

• Scaffolding must be erected and dismantled by trained professionals to ensure safety.

• Examples of scaffolding include tube and clamp, frame, and system scaffolding.

• Scaffoldin...read more

Admixtures are chemicals added to concrete to enhance its properties.

• Admixtures can improve workability, strength, durability, and resistance to chemicals and weathering.

• Examples include water reducers, accelerators, retarders, air-entraining agents, and superplasticizers.

• Admixtures can also be used to reduce the amount of water needed in concrete mixtures.

• Proper use of admixtures can result in cost savings and improved performance of concrete structures.

A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary coils, which are wrapped around a magnetic core.

• When an AC voltage is applied to the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• Tra...read more

A circuit breaker is an automatic electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

• It is used to interrupt the flow of current in an electrical circuit

• It automatically trips and disconnects the circuit when it detects an overload or short circuit

• It can be reset manually or automatically after tripping

• It is commonly used in homes, buildings, and industrial settings to protect electrical equipment and prevent fires

• Examp...read more

Maintain regular communication and interaction with all staff members.

• Regularly check in with staff to ensure they have the resources and support they need

• Hold regular team meetings to discuss project progress and address any concerns

• Encourage open communication and feedback from all team members

• Provide opportunities for team building and collaboration

• Lead by example by being accessible and approachable to all staff members

HSE Policy and Procedures are essential for ensuring the safety and well-being of employees and the environment.

• HSE policies and procedures should be clearly defined and communicated to all employees.

• Regular training and drills should be conducted to ensure that employees are aware of the policies and procedures.

• HSE policies and procedures should be regularly reviewed and updated to ensure their effectiveness.

• Examples of HSE policies and procedures include emergency response ...read more

A batching plant is a facility where ingredients for concrete are mixed and blended together to produce concrete of desired quality.

• Batching plants are used in construction projects to produce concrete in large quantities

• Ingredients such as cement, water, aggregates, and admixtures are mixed in specific proportions

• The plant ensures consistent quality and strength of the concrete produced

• Different types of batching plants include stationary, mobile, and compact batching plants

The carpet area of a 1 BHK flat refers to the actual usable area excluding the thickness of walls.

• Carpet area is the area within the walls of the flat.

• It does not include the thickness of the walls.

• It is the actual usable area for placing furniture and other items.

• Carpet area is usually measured in square feet or square meters.

• For example, a 1 BHK flat may have a carpet area of 500 square feet.

R&R police stands for Rules and Regulations police, responsible for enforcing company policies and procedures.

• Enforces company policies and procedures

• Ensures employees are following rules and regulations

• Handles disciplinary actions for policy violations

Tyre size refers to the dimensions of a tire, including width, aspect ratio, and diameter.

• Tyre size is typically expressed as a series of numbers and letters on the sidewall of the tire.

• The first number represents the width of the tire in millimeters.

• The second number is the aspect ratio, which is the height of the tire's cross-section as a percentage of the width.

• The final number is the diameter of the wheel that the tire is designed to fit.

• For example, a tire size of 205/55...read more

Planning is the process of setting goals, determining actions to achieve those goals, and allocating resources to accomplish the goals.

• Setting goals and objectives

• Identifying actions and tasks needed to achieve the goals

• Allocating resources such as time, money, and manpower

• Creating schedules and timelines

• Monitoring progress and making adjustments as needed

There are various types of structures, including residential, commercial, industrial, and infrastructure.

• Residential structures include houses, apartments, and condominiums.

• Commercial structures include office buildings, retail stores, and restaurants.

• Industrial structures include factories, warehouses, and power plants.

• Infrastructure structures include bridges, roads, and tunnels.

Initial and final setting times are important parameters in determining the workability and strength of cement.

• Initial setting time is the time taken for the cement paste to harden enough to resist a certain amount of pressure.

• Final setting time is the time taken for the cement paste to harden to the point where it can no longer be reshaped.

• Setting times can be influenced by factors such as temperature, water-cement ratio, and type of cement used.

• For example, a rapid-setting ...read more

Slop and deflections are important factors to consider in SSB.

• Slop refers to the deviation of the actual height of a point from its theoretical height.

• Deflection is the angle between the tangent to the curve at a point and the chord connecting the endpoints of the curve.

• Both slop and deflection affect the accuracy of SSB measurements.

• Proper equipment and techniques must be used to minimize errors in slop and deflection measurements.

A code book for pile testing is a reference guide that provides standardized codes and procedures for conducting pile tests.

• A code book for pile testing contains information on various types of pile tests, such as static load tests, dynamic load tests, and integrity tests.

• It outlines the recommended testing procedures, including equipment requirements, test setup, and data interpretation.

• The code book may also include guidelines for reporting and documenting test results.

• Exam...read more

Cement is used in concrete to provide strength, durability, and binding properties.

• Cement acts as a binder, holding the aggregates together in concrete.

• It provides strength to the concrete by forming a chemical reaction with water, known as hydration.

• Cement enhances the durability of concrete by protecting it from environmental factors like moisture and chemicals.

• Different types of cement can be used to achieve specific properties in concrete, such as rapid setting or high st...read more

I have 7 years of experience in the consideration fields.

• I have worked in various industries such as construction, engineering, and oil and gas.

• During my time in these fields, I have gained extensive knowledge in document control, quality assurance, and project management.

• I have also developed strong communication and organizational skills, which have allowed me to effectively manage multiple projects and stakeholders.

• Some examples of my work include managing the document con...read more

Site coordinate problems can arise due to incorrect measurements, outdated maps, or human error.

• Ensure all measurements are accurate and up-to-date

• Use GPS technology for precise location data

• Double check all calculations and coordinates before proceeding

• Consult with other surveyors or experts if unsure

• Example: If a building is constructed in the wrong location due to incorrect coordinates, it can lead to legal disputes and costly corrections

The Bocw Act stands for Building and Other Construction Workers Act, which aims to regulate the employment and conditions of service of building and other construction workers.

• The Bocw Act was enacted in 1996 in India to provide for the welfare of building and other construction workers.

• It covers aspects such as registration of workers, their safety, health, and working conditions.

• The Act also mandates the establishment of welfare boards to oversee the implementation of welfa...read more

Technical difficulties in site

• Equipment malfunction

• Material shortage

• Environmental factors

• Human error

• Lack of proper planning

• Communication breakdown

Technical difficulties in the lab can arise due to various reasons.

• Equipment malfunction

• Lack of proper calibration

• Contamination of samples

• Human error

• Power outages

• Insufficient resources

• Inadequate training

• Environmental factors

Work procedure for slabs involves preparation of subgrade, placing reinforcement, pouring concrete and finishing the surface.

• Prepare the subgrade by removing any debris and compacting the soil

• Place the reinforcement according to the design specifications

• Pour the concrete and level it using a screed board

• Finish the surface by troweling or using a power float

• Cure the slab by keeping it moist for at least 7 days

• Perform quality control checks throughout the process

Diaphragm wall work involves creating a reinforced concrete wall underground.

• Excavation of a trench to the required depth and width

• Installation of reinforcement cages

• Pouring concrete into the trench to form the wall

• Excavation of panel by panel to create a continuous wall

• Use of bentonite slurry to support the trench walls

Tremie concrete method is a technique used to place concrete underwater without washing out the cement content.

• Involves using a tremie pipe to place concrete underwater

• The pipe is slowly raised as the concrete is poured to prevent segregation

• Prevents cement washout and ensures proper placement and consolidation

• Commonly used in construction of underwater structures like bridges, dams, and foundations

Steel exhibits linear elastic behavior in tension until it reaches its yield point, after which it undergoes plastic deformation.

• Steel has a high tensile strength, making it suitable for structural applications.

• When subjected to tension, steel elongates before reaching its ultimate tensile strength.

• Steel can fail in tension due to necking or shear.

• The stress-strain curve for steel in tension typically shows a linear elastic region followed by a yield point and then plastic de...read more

Practical implementation of operational strategies to improve efficiency and productivity.

• Analyze current operations to identify areas for improvement

• Develop and implement new processes or technologies to streamline operations

• Train and mentor team members to ensure successful implementation

• Monitor and evaluate the effectiveness of implemented strategies

• Adjust strategies as needed based on performance metrics

Lunching refers to the process of launching a ship or boat into the water.

• There are two types of launching: side launch and end launch.

• Side launch involves sliding the vessel sideways into the water.

• End launch involves lowering the vessel into the water from the stern or bow.

• The type of launching used depends on the size and shape of the vessel, as well as the location of the launch site.