20+ DEC Infra Interview Questions and Answers

15-day program sheet for steel quantity of 850 sqft, 60 columns of size 600x300 mm, 30 Mt steel & steel shuttering.

• Prepare a detailed BOQ for steel and shuttering

• Calculate the required manpower and machinery

• Plan the procurement and delivery of materials

• Schedule the fabrication and installation of steel

• Allocate time for quality checks and inspections

The Slump test is used to measure the consistency of fresh concrete before it sets.

• It measures the workability of concrete.

• It determines the water content in the concrete.

• It helps to ensure that the concrete is of the desired consistency for the intended use.

• The test involves filling a standard slump cone with fresh concrete and then measuring the slump of the concrete after the cone is removed.

• The slump is the difference between the height of the cone and the height of the c...read more

The density of cement, steel, and aggregate varies.

• The density of cement typically ranges from 1,100 to 1,500 kg/m³.

• The density of steel is around 7,800 kg/m³.

• The density of aggregate depends on its type, with values ranging from 1,400 to 2,900 kg/m³.

• These values may vary depending on the specific composition and properties of the materials.

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

Minimize labour and product cost without compromising quantity.

• Automate processes to reduce labour cost

• Optimize supply chain to reduce product cost

• Implement lean manufacturing principles

• Negotiate better deals with suppliers

• Reduce waste and improve efficiency

• Invest in technology to improve productivity

• Train employees to improve skills and reduce errors

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 additional work or changes not included in the original contract.

To improve production and productivity, I would suggest optimizing the production line, implementing automation, and training employees.

• Analyze the current production process and identify bottlenecks

• Implement automation to reduce manual labor and increase efficiency

• Train employees on new technologies and processes to improve their skills

• Regularly monitor and measure production metrics to identify areas for improvement

• Implement a continuous improvement program to encourage inn...read more

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 certain event or action has taken place.

• Examples: A precedent ...read more

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 high soil resistivity or where the soil is rocky or sandy.

• Norma...read more

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

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 wire gauge, the more leads it will have.

• The number of leads in a w...read more

Sizes of cables and db box are determined by the electrical load and distance of the circuit.

• The size of the cable is determined by the electrical load and the distance of the circuit.

• The size of the distribution board (db) box is determined by the number of circuits and the size of the cables.

• The cable size is usually specified in square millimeters (mm²) or American Wire Gauge (AWG).

• The db box size is usually specified in terms of the number of ways, such as 4-way, 8-way, e...read more

Critical situations in tower crane erection and commissioning

• Failure to follow manufacturer's instructions

• Inadequate ground preparation

• Lack of proper communication between crane operator and ground personnel

• Adverse weather conditions

• Inadequate training of personnel involved in the erection and commissioning process

Yes, I have a licence for both 2 and 4 wheelers.

• I have a valid licence for both 2 and 4 wheelers.

• I am legally allowed to drive both types of vehicles.

• Having a licence for both types of vehicles gives me more flexibility in transportation options.

• I have maintained a clean driving record with no violations or accidents.

• I am aware of the traffic rules and regulations for both types of vehicles.

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 tools or machinery can cause hearing damage.

Covers are used to protect beams, columns, footings, and rafts from environmental damage and corrosion.

• Covers can be made of materials such as plastic, metal, or concrete.

• They are used to prevent water, chemicals, and other substances from damaging the structural elements.

• Covers can also be used to improve the aesthetics of the structure.

• Examples of covers include beam wraps, column wraps, footing caps, and raft covers.

• Proper installation and maintenance of covers is importan...read more

Insulation types include solid, liquid, and gas. Examples include rubber, oil, and air.

• Solid insulation includes materials like rubber, plastic, and paper

• Liquid insulation includes materials like oil and transformer oil

• Gas insulation includes materials like air, sulfur hexafluoride, and nitrogen

• Other types of insulation include ceramic, mica, and glass

• Examples of insulation used in electrical equipment include polyethylene, PVC, and Teflon

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.

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 as French, Latin, and Greek.

• English has different dialect...read more

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 appropriate cable size