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DEC Infra Interview Questions and Answers
25 Interview questions
Plastering calculation involves determining the amount of plaster needed based on surface area and mix ratio.
Calculate the surface area to be plastered (length x height).
Determine the thickness of plaster (typically 12-15 mm for internal walls).
Use the plaster mix ratio (e.g., 1:4 for cement to sand) to calculate material quantities.
Example: For a wall of 10m² and 15mm thickness, volume = 10 x 0.015 = 0.15 m³.
For ...
I prioritize security through comprehensive risk assessments, employee training, and robust incident response plans.
Conduct regular risk assessments to identify vulnerabilities, such as evaluating access controls and data protection measures.
Implement employee training programs on security protocols, including phishing awareness and data handling best practices.
Establish a clear incident response plan to address s...
Different types of bills used in construction management include preliminary bill, interim bill, final bill, and supplementary bill.
Preliminary bill: Prepared before the start of the project to estimate costs.
Interim bill: Issued periodically during the project to request payment for work completed.
Final bill: Issued at the completion of the project to settle the remaining costs.
Supplementary bill: Issued for addi...
Different types of conditions found in contracts include precedent conditions, concurrent conditions, and subsequent conditions.
Precedent conditions: These are conditions that must be met before a party is obligated to perform under the contract.
Concurrent conditions: These are conditions that must be performed simultaneously by both parties.
Subsequent conditions: These are conditions that come into effect after a...
VDF stands for Vacuum Dewatered Flooring, a technique for creating strong, durable concrete surfaces.
VDF is used in industrial flooring applications for its high strength and durability.
The process involves using vacuum pumps to remove excess water from concrete.
This technique helps in achieving a denser concrete mix, reducing porosity.
VDF is commonly used in warehouses, factories, and parking lots.
It enhances the...
Calculate pile concrete quantity by determining volume based on dimensions and number of piles.
Determine the diameter and length of the pile. For example, a pile with a diameter of 0.5 m and length of 10 m.
Calculate the volume of a single pile using the formula: Volume = π × (Diameter/2)² × Length.
For a pile with a diameter of 0.5 m and length of 10 m, Volume = π × (0.25)² × 10 ≈ 1.96 m³.
Multiply the volume of a s...
Sq mm stands for square millimeter, a unit of area measurement.
Sq mm is a unit of measurement used to quantify the area of a two-dimensional space.
It is equal to the area of a square with sides measuring 1 millimeter each.
Commonly used in engineering and construction for measuring small areas.
Example: A sheet of paper may have dimensions of 210 mm x 297 mm, which is equivalent to 62370 sq mm.
Cable size can be calculated based on current carrying capacity, voltage drop, and installation conditions.
Determine the current carrying capacity required for the cable based on the load
Calculate the voltage drop allowed for the cable based on the distance and voltage rating
Consider the installation conditions such as ambient temperature and grouping of cables
Use cable sizing charts or online calculators to find ...
Chemical earthing involves the use of chemicals to improve conductivity and reduce soil resistivity.
Normal earthing involves the use of a metal rod or plate buried in the ground to provide a low resistance path for fault current.
Chemical earthing involves the use of chemicals such as bentonite, salt, and charcoal to improve conductivity and reduce soil resistivity.
Chemical earthing is more effective in areas with ...
The number of leads in sqmm wire depends on the wire gauge and its application.
The number of leads in a sqmm wire can range from 1 to over 1000 depending on the wire gauge and its application.
For example, a 1 sqmm wire may have a single lead, while a 1000 sqmm wire may have over 1000 leads.
The number of leads in a wire can also depend on whether it is a single-core or multi-core wire.
In general, the larger the wir...
DEC Infra Interview Experiences
25 interviews found
Anonymous
I applied via Walk-in and was interviewed before Dec 2020. There were 3 interview rounds.
Interview Questionnaire
3 Questions
- Q1. Concrete grades and ratios
- Q2. 1sqm of wall plastering area how to find sand cement quantity
- Ans.
To find sand and cement quantity for 1sqm of wall plastering area, certain calculations need to be done.
Determine the thickness of the plastering required
Calculate the volume of plastering required
Determine the ratio of sand and cement to be used
Calculate the quantity of sand and cement required based on the ratio
Add water to the mixture and mix thoroughly to get the plastering material
- Q3. Give me a drawing calculate steel
- Ans.
Drawing to calculate steel for what purpose?
Need more information on the purpose of the steel calculation
Is it for a building, bridge, or other structure?
What are the load requirements and environmental factors?
Consult engineering standards and codes for appropriate calculations
Interview Preparation Tips
Selected
I appeared for an interview in Jan 2025.
(2 Questions)
- Q1. What are the different types of bills used in construction management?
- Ans.
Different types of bills used in construction management include preliminary bill, interim bill, final bill, and supplementary bill.
Preliminary bill: Prepared before the start of the project to estimate costs.
Interim bill: Issued periodically during the project to request payment for work completed.
Final bill: Issued at the completion of the project to settle the remaining costs.
Supplementary bill: Issued for additiona...
- Q2. What are the different types of conditions found in contracts?
- Ans.
Different types of conditions found in contracts include precedent conditions, concurrent conditions, and subsequent conditions.
Precedent conditions: These are conditions that must be met before a party is obligated to perform under the contract.
Concurrent conditions: These are conditions that must be performed simultaneously by both parties.
Subsequent conditions: These are conditions that come into effect after a cert...
(2 Questions)
- Q1. Is the salary negotiable?
- Q2. Is the notice period negotiable?
Selected
I applied via Walk-in and was interviewed in Dec 2024. There was 1 interview round.
(2 Questions)
- Q1. How to calculate Pile concrete Qty?
- Ans.
Calculate pile concrete quantity by determining volume based on dimensions and number of piles.
Determine the diameter and length of the pile. For example, a pile with a diameter of 0.5 m and length of 10 m.
Calculate the volume of a single pile using the formula: Volume = π × (Diameter/2)² × Length.
For a pile with a diameter of 0.5 m and length of 10 m, Volume = π × (0.25)² × 10 ≈ 1.96 m³.
Multiply the volume of a single...
- Q2. What is vdf ?
- Ans.
VDF stands for Vacuum Dewatered Flooring, a technique for creating strong, durable concrete surfaces.
VDF is used in industrial flooring applications for its high strength and durability.
The process involves using vacuum pumps to remove excess water from concrete.
This technique helps in achieving a denser concrete mix, reducing porosity.
VDF is commonly used in warehouses, factories, and parking lots.
It enhances the surf...
Selected
I appeared for an interview in Feb 2025, where I was asked the following questions.
- Q1. How handle security
- Ans.
I prioritize security through comprehensive risk assessments, employee training, and robust incident response plans.
Conduct regular risk assessments to identify vulnerabilities, such as evaluating access controls and data protection measures.
Implement employee training programs on security protocols, including phishing awareness and data handling best practices.
Establish a clear incident response plan to address securi...
- Q2. Implementation of security systems
I applied via Newspaper Ad
(1 Question)
- Q1. Yes knowledge for batching plant maintenance
Interview Preparation Tips
About construction methods, case study
I applied via Walk-in and was interviewed in Jun 2023. There were 2 interview rounds.
(5 Questions)
- Q1. However you have learned in hindi and english tell me something about what should I say?
- Ans. Sir, good morning, we are all coming from Guntakal native and most probably, I have completed my NAC course in 2014.
- Q2. Say something about English language.
- Ans.
English language is a widely spoken language with a rich history and diverse vocabulary.
English is the third most spoken language in the world.
It is the official language of many countries, including the United States, United Kingdom, Canada, Australia, and New Zealand.
English has a large vocabulary, with over 170,000 words in current use.
It is a Germanic language, but has borrowed words from many other languages, such...
- Q3. Are you prepared for teaching?
- Q4. Is there is any health issues?
- Ans.
Yes, there are potential health issues for electricians.
Exposure to electrical currents can cause electric shock, burns, and even death.
Working in confined spaces or at heights can increase the risk of falls and injuries.
Exposure to hazardous materials like asbestos or lead may occur during electrical work.
Repetitive motions and awkward postures can lead to musculoskeletal disorders.
Exposure to loud noises from power t...
- Q5. Your prep was completely understand 3 months review?
Interview Preparation Tips
(1 Question)
- Q1. Self confidence
(1 Question)
- Q1. General questions
I applied via Approached by Company
(2 Questions)
- Q1. How to calculate cable size?
- Ans.
Cable size can be calculated based on current carrying capacity, voltage drop, and installation conditions.
Determine the current carrying capacity required for the cable based on the load
Calculate the voltage drop allowed for the cable based on the distance and voltage rating
Consider the installation conditions such as ambient temperature and grouping of cables
Use cable sizing charts or online calculators to find the a...
- Q2. What is mean of sq mm ?
- Ans.
Sq mm stands for square millimeter, a unit of area measurement.
Sq mm is a unit of measurement used to quantify the area of a two-dimensional space.
It is equal to the area of a square with sides measuring 1 millimeter each.
Commonly used in engineering and construction for measuring small areas.
Example: A sheet of paper may have dimensions of 210 mm x 297 mm, which is equivalent to 62370 sq mm.
Selected
I appeared for an interview in Feb 2023.
(3 Questions)
- Q1. Tell me about yourself
- Q2. Do you have experience Are you comfortable coming to office everyday
- Ans.
I have relevant experience and am fully comfortable with daily office attendance, eager to contribute to the team.
I have completed an internship in finance where I managed budgets and financial reports.
During my studies, I worked part-time in a finance department, gaining hands-on experience.
I thrive in structured environments and enjoy collaborating with colleagues in person.
- Q3. If required will you work on sundays
MOTURU SUDHEER
Selected
I appeared for an interview before Dec 2020, where I was asked the following questions.
- Q1. Grades of concrete
- Ans.
Concrete grades indicate the compressive strength and mix proportions, essential for construction quality and durability.
Concrete grades are classified based on their compressive strength, measured in megapascals (MPa).
Common grades include M20 (20 MPa), M25 (25 MPa), and M30 (30 MPa), used for different structural applications.
Higher grades like M40 and M50 are used for high-strength applications, such as bridges and ...
- Q2. Density of sand, cement, steel
- Ans.
Density values for sand, cement, and steel are crucial for construction and engineering calculations.
Density of sand: Typically ranges from 1.44 to 1.60 g/cm³ depending on moisture content and type.
Density of cement: Generally around 1.44 g/cm³ for ordinary Portland cement.
Density of steel: Approximately 7.85 g/cm³, making it much denser than sand and cement.
Example: Knowing the density helps in calculating the weight ...
- Q3. Plastering calculation with material requirement
- Ans.
Plastering calculation involves determining the amount of plaster needed based on surface area and mix ratio.
Calculate the surface area to be plastered (length x height).
Determine the thickness of plaster (typically 12-15 mm for internal walls).
Use the plaster mix ratio (e.g., 1:4 for cement to sand) to calculate material quantities.
Example: For a wall of 10m² and 15mm thickness, volume = 10 x 0.015 = 0.15 m³.
For a 1:4...
- Q4. Steel and shuttering quantities
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DEC Infra Interviews By Designations
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