30+ Alldigi Tech Interview Questions and Answers

Minimum grade of concrete for construction purposes.

• Minimum grade of concrete used is M10.

• Higher grades of concrete are used for stronger structures.

• Grade of concrete depends on the type of construction and load-bearing capacity required.

Quantity of a specific item or material is calculated by multiplying the dimensions and density of the material.

• Calculate volume by multiplying length, width, and height

• Determine density of the material

• Multiply volume by density to get quantity

• For example, to calculate quantity of concrete needed for a slab, multiply slab dimensions by density of concrete

Concrete compensation percentage varies based on factors like experience, location, and company size.

• Concrete compensation percentage can range from 5% to 20% of the total project cost.

• Factors influencing concrete compensation percentage include experience level of the engineer, location of the project, and size of the company.

• For example, a junior civil site engineer may receive a lower percentage compared to a senior engineer working in a metropolitan area for a large const...read more

The grade of concrete refers to its strength and is classified based on its compressive strength.

• Concrete grades range from M5 to M100, with M representing mix and the number representing the compressive strength in megapascals (MPa).

• The most commonly used grades of concrete are M20, M25, and M30.

• Higher grade concrete is used for structures that require greater strength, such as bridges and high-rise buildings.

• The grade of concrete is determined by testing a sample of the con...read more

The question asks about years of experience in a construction company, plaster work size, and M20 grade concrete ratio.

• Years of experience in a construction company

• Plaster work size

• M20 grade concrete ratio

Concrete ratio is the proportion of cement, sand, and aggregate in a concrete mix.

• Concrete ratio is typically expressed as a ratio of cement:sand:aggregate, such as 1:2:4.

• The ratio may vary depending on the strength and durability requirements of the concrete mix.

• Common concrete ratios include 1:1.5:3, 1:2:4, and 1:3:6.

• The grade of concrete (e.g. M20, M25) also determines the concrete ratio.

I use a combination of document review, site visits, and communication with stakeholders to verify information.

• Reviewing project documents such as drawings, specifications, and reports

• Conducting site visits to physically inspect the work and verify conditions

• Communicating with project team members, clients, and contractors to clarify information

• Utilizing surveying and testing equipment to validate data

• Cross-referencing information from multiple sources to ensure accuracy

The temperature of concrete can vary depending on factors such as the mix design, curing conditions, and ambient temperature.

• The temperature of freshly mixed concrete is typically between 50-75 degrees Fahrenheit.

• During curing, the concrete temperature should be maintained above 50 degrees Fahrenheit for proper hydration.

• Extreme temperatures, either too hot or too cold, can affect the strength and durability of concrete.

• Concrete temperature can be monitored using thermocouple...read more

Various materials are used in construction including concrete, steel, wood, brick, and asphalt.

• Concrete is commonly used for foundations, walls, and floors

• Steel is used for structural frames and reinforcement

• Wood is used for framing, flooring, and finishing

• Brick is used for walls and facades

• Asphalt is used for roads and pavements

Dry density at field can be found using the sand replacement method.

• Use sand replacement method to find the volume of the hole

• Calculate the weight of the excavated soil

• Divide the weight of soil by the volume of the hole to get the dry density

• Dry density = Weight of soil / Volume of hole

The size of a parapet wall can vary depending on the specific design requirements and building codes.

• The typical height of a parapet wall is around 3 feet, but it can be higher for safety reasons or aesthetic purposes.

• The thickness of a parapet wall is usually around 8 inches to provide structural support.

• The length of a parapet wall will depend on the length of the building facade it is protecting.

• Parapet walls can be made of various materials such as brick, concrete, or met...read more

Construction materials are substances used for building and construction purposes.

• Common construction materials include concrete, steel, wood, brick, and asphalt.

• Each material has specific properties and uses in construction projects.

• Materials must meet certain standards and regulations for safety and durability.

• Selection of materials depends on factors like cost, availability, and project requirements.

Concrete setting is the process in which concrete hardens and gains strength over time.

• Concrete setting is the transformation of concrete from a plastic state to a hardened state.

• It involves a chemical reaction called hydration, where water reacts with the cement in the concrete mixture.

• The setting time of concrete can vary depending on factors like temperature, humidity, and mix design.

• Proper curing is essential to ensure the concrete reaches its full strength potential.

• Exam...read more

Column cover size refers to the dimensions of the material used to cover or encase a structural column.

• Column cover size is typically specified in terms of width, depth, and height.

• It is important to consider the aesthetic and functional requirements when determining the column cover size.

• Examples of column cover materials include metal, wood, stone, or composite materials.

• Column cover size can vary depending on the design and structural requirements of the building.

Beam cover is the distance between the outer face of the concrete beam and the outer face of the column or slab.

• Beam cover is important for protecting the reinforcement bars from corrosion and fire damage.

• It also helps in providing adequate strength and durability to the structure.

• The beam cover requirement may vary based on the type of structure and environmental conditions.

• For example, in coastal areas where there is a higher risk of corrosion, a larger beam cover may be re...read more

OMC stands for Optimum Moisture Content.

• OMC is the moisture content at which a soil becomes most workable for compaction.

• It is an important parameter in soil mechanics and geotechnical engineering.

• OMC is determined through laboratory tests like Proctor compaction test.

• Knowing the OMC helps in achieving the desired level of compaction for construction projects.

BBS stands for Bar Bending Schedule and Survey refers to the process of measuring and mapping an area.

• BBS is a document that provides details of reinforcement cutting length, type, and bending shape for construction.

• Survey involves measuring and mapping land to determine boundaries, elevations, and other important information.

• Both BBS and Survey are crucial in the construction industry to ensure accurate and efficient building processes.

The railway gauge is the distance between the inner sides of the two parallel rails on a railway track.

• Standard gauge is 1435 mm (4 ft 8 1/2 in) used in most of the world

• Narrow gauge is less than standard gauge, used in mountainous regions or for heritage railways

• Broad gauge is wider than standard gauge, used in some countries like India and Russia

M20 is a grade of concrete with a compressive strength of 20 MPa.

• M20 is a commonly used grade of concrete in construction.

• It has a compressive strength of 20 MPa or 2900 psi.

• It is suitable for non-load bearing walls, footings, and other general construction purposes.

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

Estimation is the process of calculating the quantities and costs of materials, labor, and equipment required for a construction project.

• Estimation involves determining the quantities of materials needed for a project.

• It also includes calculating the labor hours required for the project.

• Estimation considers the costs of equipment and other resources needed for the project.

• Estimation helps in creating a budget and timeline for the construction project.

Soil test is a process of analyzing the properties of soil to determine its suitability for construction purposes.

• Soil tests help in determining the strength, permeability, compaction, and other important properties of soil.

• Different types of soil tests include sieve analysis, moisture content test, proctor compaction test, etc.

• Results of soil tests help in designing foundations, pavements, retaining walls, and other structures.

• Soil tests are essential for ensuring the safety...read more

Railway point and crossing are components of railway tracks that allow trains to switch between different tracks.

• Railway points are movable rails that allow trains to switch from one track to another.

• Crossings are where two tracks intersect, allowing trains to cross over from one track to another.

• Points and crossings are essential for ensuring smooth and safe operation of trains on railway networks.

BBS stands for Bar Bending Schedule.

• BBS is a document that provides details of reinforcement steel bars required for a construction project.

• It includes information about the diameter, length, and shape of each bar, as well as the number of bars needed.

• BBS helps in estimating the quantity of steel required and ensures proper placement and arrangement of reinforcement in the structure.

• It is prepared based on the structural drawings and specifications.

• BBS is essential for accura...read more

RCC stands for Reinforced Cement Concrete, a composite material made of concrete and steel reinforcement.

• RCC is a versatile construction material used in buildings, bridges, dams, etc.

• It combines the compressive strength of concrete with the tensile strength of steel reinforcement.

• RCC elements include beams, columns, slabs, and foundations.

• Example: RCC beams are used to support the load of the structure and transfer it to the columns.

• Example: RCC slabs are used as floors and ...read more

DPR stands for Detailed Project Report, which is a comprehensive document that outlines the details of a construction project.

• DPR includes information on project scope, objectives, cost estimates, timelines, resources, and potential risks.

• It serves as a roadmap for the project, guiding the engineers and stakeholders throughout the construction process.

• DPR is crucial for obtaining approvals, funding, and ensuring the successful completion of the project.

• Examples of contents in...read more

Railway budget is the financial plan specifically for the development and maintenance of railway infrastructure.

• Railway budget allocates funds for various projects such as new railway lines, station upgrades, and safety improvements.

• It also includes provisions for modernization of railway systems, procurement of new rolling stock, and implementation of technology upgrades.

• The budget is crucial for ensuring the efficient operation and expansion of the railway network.

• Examples ...read more

Railway ballast is a layer of crushed rock or gravel placed beneath the tracks to provide stability and drainage.

• Railway ballast is typically made of crushed stone or gravel.

• It is placed beneath the railway tracks to provide stability and support.

• Ballast helps to distribute the weight of the trains and prevent the tracks from shifting.

• It also helps with drainage to prevent water from pooling on the tracks.

• Regular maintenance is required to ensure the ballast remains in good c...read more

Interacting effectively involves active listening, clear communication, empathy, and professionalism.

• Practice active listening by giving full attention to the speaker and asking clarifying questions.

• Communicate clearly and concisely to avoid misunderstandings.

• Show empathy by understanding others' perspectives and emotions.

• Maintain professionalism by being respectful, courteous, and reliable in interactions.

• Seek feedback to improve communication skills and relationships.

• Exampl...read more

Different types of foundations include shallow foundations, deep foundations, and special foundations.

• Shallow foundations are typically used for light structures and consist of spread footings, mat foundations, and slab-on-grade foundations.

• Deep foundations are used when the soil near the surface is not suitable for supporting the structure's load. Examples include pile foundations and drilled shafts.

• Special foundations are designed for specific soil conditions or structural ...read more

Sleepers are structural elements used to support railway tracks. Types include wooden, concrete, steel, and composite sleepers.

• Wooden sleepers are traditional and cost-effective but require frequent maintenance.

• Concrete sleepers are durable and have a longer lifespan compared to wooden sleepers.

• Steel sleepers are used in special applications where high strength and durability are required.

• Composite sleepers are a newer alternative made from a combination of materials for impr...read more

Full form of FSLM is Flexible Substrate Light Emitting Module.

• FSLM is a type of LED module that is flexible and can be bent or curved to fit different surfaces.

• These modules are commonly used in signage, displays, and architectural lighting.

• FSLMs are energy efficient and have a long lifespan compared to traditional lighting sources.