60+ Interview Questions and Answers

Setting time of concrete refers to the time it takes for the concrete to harden and gain strength.

• Setting time is influenced by factors like temperature, water-cement ratio, and type of cement used.

• Initial setting time is typically around 30 minutes to 1.5 hours.

• Setting time can be determined using various methods such as the Vicat apparatus or penetration resistance tests.

Fly ash and admixtures commonly used in heavy construction include Class F fly ash and water-reducing admixtures.

• Class F fly ash, which is produced from burning anthracite or bituminous coal, is commonly used in heavy construction.

• Water-reducing admixtures, such as plasticizers or superplasticizers, are often added to concrete mixes in heavy construction to improve workability and reduce water content.

• Other types of fly ash, such as Class C fly ash produced from burning ligni...read more

Quality assurance focuses on preventing defects, while quality control focuses on identifying and correcting defects.

• Quality assurance is a proactive process that involves establishing standards and procedures to prevent defects.

• Quality control is a reactive process that involves inspecting and testing products to identify and correct defects.

• Quality assurance is concerned with the overall process and system, while quality control is concerned with the individual products or ...read more

If aggregate failed in Petrography test, what are the steps to be adopted?

• Identify the cause of failure

• Check if the sample was representative

• Re-test the sample to confirm the failure

• Notify the supplier and request for replacement

• Investigate the quality control measures of the supplier

• Consider alternative sources of aggregate

Silt is harmful for concrete as it reduces its strength and durability.

• Silt particles are fine and can fill the voids in concrete, reducing its strength.

• Silt can increase the water demand of concrete, affecting its workability.

• Silt can cause segregation and bleeding in concrete, leading to poor quality.

• Silt can react with cement and other constituents, compromising the chemical reactions.

• Silt can result in a rough surface finish and reduced aesthetic appeal of concrete.

Finding number with most frequency in 1M size array of strings.

• Use a hash table to store the frequency of each number.

• Iterate through the array and update the frequency in the hash table.

• Find the number with the highest frequency in the hash table.

Moisture correction is calculated by adjusting the measured moisture content of a material to a standard moisture content.

• Determine the measured moisture content of the material

• Determine the standard moisture content for the material

• Calculate the moisture correction factor using the formula: MCf = (SMC - MMC) / MMC

• Apply the moisture correction factor to adjust the measured moisture content: Corrected MC = Measured MC * (1 + MCf)

Basic things required to create a project plan include defining project scope, setting objectives, creating a work breakdown structure, determining resources, and establishing a timeline.

• Define project scope to outline the boundaries and deliverables of the project.

• Set clear objectives to ensure the project goals are understood by all stakeholders.

• Create a work breakdown structure (WBS) to break down the project into manageable tasks.

• Determine resources needed for the project...read more

Total float is the amount of time an activity can be delayed without delaying the project, while free float is the amount of time an activity can be delayed without delaying the early start of its successor activity.

• Total float is the total amount of time that an activity can be delayed without delaying the project completion date.

• Free float is the amount of time that an activity can be delayed without delaying the early start of its successor activity.

• Total float considers t...read more

Critical path is the longest sequence of activities in a project that determines the shortest possible duration. Float of critical activities is zero.

• Critical path is the sequence of activities that determines the minimum project duration.

• It consists of activities that have zero float, meaning any delay in these activities will delay the project.

• Float of critical activities is zero, meaning they cannot be delayed without delaying the project.

• Non-critical activities have float...read more

I would consider various factors before making a decision, such as career growth opportunities, job satisfaction, work-life balance, and potential for learning and development.

• Consider the overall job satisfaction and career growth opportunities in the current company

• Evaluate the potential for learning and development in the new company

• Assess the work-life balance and job security in both companies

• Consider any additional benefits or perks offered by the new company

• Consult wit...read more

I would try to find alternative spare parts or order the required spare part from a supplier.

• Check if there are any alternative spare parts available in the store

• Search for the required spare part from other stores or suppliers

• Order the required spare part from a supplier

• Try to repair the machine using other available resources

• Consult with colleagues or experts for alternative solutions

To design bearing brackets for a hydro generator, the cross section of arms is determined based on load considerations and materials are selected for their strength and corrosion resistance.

• The design of bearing brackets for a hydro generator involves determining the cross section of arms.

• The cross section of arms is decided based on load considerations such as the weight of the rotor, hydraulic forces, and any additional loads.

• Finite element analysis (FEA) can be used to sim...read more

The stator core is a crucial component in an electric motor, providing support and magnetic flux. Clamping force, number of bolts, material, and cold rolled sheets are determined based on design requirements.

• The function of the stator core is to support the windings and provide a path for the magnetic flux in an electric motor.

• The clamping force for the stator core is determined based on the mechanical load and the desired level of stability.

• The number of bolts for clamping t...read more

New operator introduction and observation process

• Introduce new operator to the team and explain their role and responsibilities

• Provide necessary training and guidance to ensure they understand the process

• Assign a mentor or supervisor to monitor their progress and provide feedback

• Regularly check the attendance and schedule of the team to identify new joiners

• Conduct a brief orientation session for new joiners to introduce them to the team and the process

During of concrete is done to ensure proper curing and strength development.

• During of concrete refers to the process of maintaining the moisture and temperature conditions for the concrete to cure properly.

• Proper curing is essential for the hydration process of cement, which leads to the development of strength and durability in concrete.

• During of concrete helps to prevent cracking, shrinkage, and surface defects.

• It allows the concrete to reach its full potential strength and...read more

RCPT stands for Rapid Chloride Permeability Test, used to measure the permeability of concrete to chloride ions.

• RCPT is a non-destructive test used to evaluate the durability of concrete.

• It measures the rate at which chloride ions penetrate the concrete.

• The test involves applying an electrical charge to the concrete sample and measuring the current flow.

• The results of the test can be used to determine the likelihood of corrosion in the concrete.

• RCPT is commonly used in the co...read more

Grading of aggregates is important for ensuring the quality and strength of concrete.

• Grading helps to ensure that the aggregates are evenly distributed in the concrete mix.

• It helps to reduce the amount of cement needed for a given strength of concrete.

• Proper grading can improve the workability and finishability of the concrete.

• It can also help to reduce the risk of cracking and shrinkage in the finished product.

• Examples of grading methods include the use of sieves or screens ...read more

The 3 safety words are: prevent, protect, and respond.

• Prevent: Taking proactive measures to avoid accidents or hazards.

• Protect: Ensuring the safety and well-being of individuals and property.

• Respond: Reacting promptly and effectively in case of emergencies or incidents.

Communicate problems to managers by being clear, concise, and providing solutions.

• Identify the problem and its impact on the project or team

• Provide possible solutions or recommendations

• Communicate in a clear and concise manner

• Use data or evidence to support your claims

• Be respectful and professional

• Follow up to ensure the problem is addressed

The design of a generator shaft involves considering factors such as material selection, stress analysis, and balancing.

• Select appropriate material for the shaft based on factors like strength, corrosion resistance, and cost.

• Perform stress analysis to ensure the shaft can withstand the operating loads and torque.

• Consider factors like shaft diameter, length, and keyway design.

• Balance the shaft to minimize vibrations and ensure smooth operation.

• Calculate the coupling between sh...read more

Rotor dynamics is the study of the behavior and performance of rotating machinery.

• Rotor dynamics involves analyzing the vibrations, stability, and performance of rotating components such as rotors, shafts, and bearings.

• Inputs required for rotor dynamics analysis include rotor geometry, material properties, operating conditions, and boundary conditions.

• The output of rotor dynamics analysis includes critical speeds, mode shapes, natural frequencies, and stability margins.

• Rotor ...read more

Primary duties of planning engineer include creating project schedules, monitoring progress, identifying delays, and coordinating with stakeholders.

• Creating and maintaining project schedules

• Monitoring project progress and identifying delays

• Coordinating with project team members and stakeholders

• Analyzing project data and providing reports

• Implementing changes to schedules as needed

Resource leveling is the process of smoothing out resource allocation to prevent peaks and valleys in resource usage.

• Resource leveling involves adjusting the start and finish dates of activities to ensure resources are not overallocated at any point in time.

• Resource allocation is the process of assigning resources to specific activities based on availability, skills, and requirements.

• Resource leveling helps in optimizing resource utilization and avoiding bottlenecks in projec...read more

To understand the reason for breakdown, one needs to analyze the symptoms and perform diagnostic tests.

• Analyze the symptoms of the breakdown

• Perform diagnostic tests to identify the root cause

• Check for any error codes or warning messages

• Inspect the affected components or systems

• Review maintenance records and history

• Consult with other technicians or experts for advice

I have attended major breakdowns related to electrical systems and machinery.

• Attended breakdown of a transformer resulting in power outage for an entire factory.

• Resolved breakdown of a CNC machine resulting in production delay of 2 days.

• Fixed breakdown of a conveyor belt system resulting in halt of material transportation.

• Repaired breakdown of a generator resulting in loss of backup power supply.

• Handled breakdown of a motor control center resulting in shutdown of multiple mac...read more

I directly manage a team of 5 production engineers and report to the Production Manager.

• I manage a team of 5 production engineers

• I report to the Production Manager

• I am responsible for overseeing production processes and ensuring efficiency

• I provide guidance and support to my team to meet production targets

I maintain records of my works through a digital database and physical documentation.

• I use a digital database to store all relevant information such as project details, timelines, and progress reports.

• I also maintain physical documentation such as drawings, schematics, and maintenance logs.

• I ensure that all records are up-to-date and easily accessible for future reference.

• I follow company policies and procedures for record-keeping and ensure that all records are accurate and ...read more

Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.

• Sand is formed by the erosion of rocks, minerals, and organic materials.

• It is commonly found on beaches, deserts, riverbeds, and in construction materials.

• The size of sand particles can range from 0.063 mm to 2 mm.

• Sand is used in various industries such as construction, glass manufacturing, and electronics.

• Different types of sand include beach sand, desert sand, and river san...read more

To find length of linked list in single iteration, use two pointers and traverse the list until the end.

• Use two pointers, one moving one node at a time and the other moving two nodes at a time.

• Traverse the list until the end is reached.

• The number of iterations taken by the faster pointer to reach the end is the length of the linked list.

I will diagnose the root cause of the breakdown and implement the appropriate solution.

• Conduct a thorough inspection of the equipment to identify the problem

• Refer to technical manuals and schematics to troubleshoot the issue

• Utilize diagnostic tools and equipment to pinpoint the cause of the breakdown

• Implement the appropriate solution, whether it be repairing or replacing faulty components

• Test the equipment to ensure it is functioning properly before returning it to service

A good schedule is one that is realistic, achievable, and well-organized.

• A good schedule should be realistic and take into account all necessary tasks and resources.

• It should be achievable within the given time frame and budget.

• The schedule should be well-organized with clear milestones and deadlines.

• Regular monitoring and updates are essential to ensure the schedule stays on track.

• Examples: Gantt charts, critical path method, resource leveling.

OSHA stands for Occupational Safety and Health Administration, while ISO stands for International Organization for Standardization.

• OSHA is a government agency in the United States that sets and enforces workplace safety and health regulations.

• It ensures that employers provide a safe and healthy working environment for their employees.

• OSHA conducts inspections, issues citations and penalties for non-compliance, and provides training and resources to promote workplace safety.

• IS...read more

HR plays a crucial role in safety by developing policies, training employees, and ensuring compliance with regulations.

• HR develops safety policies and procedures to create a safe work environment.

• HR conducts safety training programs to educate employees on best practices and emergency procedures.

• HR ensures compliance with safety regulations and conducts audits to identify and address potential hazards.

• HR investigates and addresses safety concerns or incidents reported by empl...read more

C section beam is poor in torsion compared to I section beam.

• C section beam has a lower torsional rigidity due to its shape

• I section beam has a higher torsional rigidity due to its symmetrical shape

• C section beam is more prone to twisting under load

• I section beam is commonly used in structures where torsional forces are present

I handle conflicts by actively listening, understanding the root cause, and finding a mutually beneficial solution.

• I listen to all parties involved and try to understand their perspectives

• I identify the root cause of the conflict

• I propose solutions that benefit all parties involved

• I remain calm and professional throughout the process

• I follow up to ensure the conflict has been resolved

I use tools like Adobe Creative Suite, Sketch, and InVision on a daily basis.

• Adobe Creative Suite

• Sketch

• InVision

The transfer function formula is the ratio of output to input in Laplace domain.

• Transfer function = Output / Input

• It is represented in Laplace domain

• It is used to analyze the behavior of a system

• Example: Transfer function of a low-pass filter is H(s) = 1 / (1 + sRC)

To operate a CNC machine, you need to have knowledge of programming, tooling, machine setup, and troubleshooting.

• Understand CNC programming languages like G-code and M-code

• Load and secure workpieces onto the machine

• Select and install appropriate cutting tools

• Set up machine parameters such as feed rate, spindle speed, and tool offsets

• Run test programs to ensure proper machine operation

• Monitor the machine during operation and make adjustments as needed

• Perform routine maintenanc...read more

Heat is generated in a steam power plant through combustion of fuel to produce high temperature steam.

• Fuel such as coal, natural gas, or oil is burned in a boiler to produce heat

• The heat is used to boil water and produce high pressure steam

• The steam is then directed towards a turbine, where it expands and drives a generator to produce electricity

ISO 45001 is the safety standard.

• ISO 45001 is the international standard for occupational health and safety management systems.

• It provides a framework to improve employee safety, reduce workplace risks, and create better and safer working conditions.

• ISO 45001 is designed to be integrated with other management systems such as ISO 9001 and ISO 14001.

• It replaces the previous standard OHSAS 18001.

Swaps are financial agreements between two parties to exchange cash flows or assets.

• Swaps are commonly used to manage interest rate risk or currency risk.

• There are different types of swaps such as interest rate swaps, currency swaps, and commodity swaps.

• In an interest rate swap, two parties agree to exchange interest rate payments, typically fixed for floating or vice versa.

• Currency swaps involve exchanging principal and interest payments in different currencies.

• Swaps can be ...read more

Efficiency formula is output divided by input

• Efficiency = Output / Input

• Output can be the amount of work done or the amount of product produced

• Input can be the amount of time, energy, or resources used

• Efficiency is expressed as a percentage or decimal

Constraints are limitations or restrictions that affect the planning and execution of a project.

• Constraints can be related to time, budget, resources, or scope.

• They can also include external factors such as regulations, market conditions, or stakeholder requirements.

• Examples of constraints include a fixed deadline, a limited budget, a shortage of skilled labor, or a specific technology requirement.

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

• Firewalls can be hardware or software-based

• They act as a barrier between a trusted internal network and untrusted external network

• Firewalls can block or allow traffic based on IP addresses, ports, protocols, or applications

• Examples of firewalls include Cisco ASA, Palo Alto Networks, and Windows Firewall

CNC milling program is a computer program used to control CNC milling machines.

• CNC milling program is a software that generates instructions for CNC milling machines.

• It converts CAD/CAM designs into machine-readable code.

• The program controls the movement of the machine's cutting tools to shape and cut materials.

• It allows for precise and automated machining processes.

• Examples of CNC milling programs include G-code and M-code.

Trading is the buying and selling of financial instruments such as stocks, bonds, and commodities in order to make a profit.

• Trading involves the exchange of financial instruments in a market setting

• Traders aim to buy low and sell high to make a profit

• Different types of trading include day trading, swing trading, and position trading

Treasury involves managing a company's financial assets, investments, and cash flow to ensure liquidity and financial stability.

• Involves managing cash flow, investments, and financial assets

• Ensures liquidity and financial stability for the company

• May involve managing debt, foreign exchange risk, and interest rate risk

• Works closely with other departments like finance, accounting, and risk management

Liquidity refers to the ease with which an asset or security can be bought or sold in the market without causing a significant change in its price.

• Liquidity is important for investors as it allows them to quickly convert their assets into cash.

• Highly liquid assets include stocks traded on major exchanges, while real estate is considered less liquid.

• Liquidity is often measured by bid-ask spreads, trading volume, and market depth.

Calculate sum of even numbers in an array of strings

• Iterate through the array and convert each element to integer

• Check if the number is even using modulo operator

• If even, add it to a running total

• Return the total sum of even numbers

Rankine cycle is a thermodynamic cycle used in steam power plants to convert heat into mechanical work.

• Rankine cycle involves four processes: compression, heating, expansion, and cooling.

• Steam is used as the working fluid in Rankine cycle.

• The cycle starts with the compression of the working fluid, followed by heating in a boiler to produce high-pressure steam.

• The high-pressure steam then expands through a turbine to produce mechanical work.

• Finally, the steam is condensed back...read more

String is immutable in Java to ensure security, thread safety, and optimization.

• Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.

• String pooling allows Java to reuse common string literals, improving memory efficiency.

• Immutable strings prevent accidental changes, ensuring data integrity and security.

Safety in a lab setting refers to the measures taken to prevent accidents, injuries, and exposure to hazardous materials.

• Safety protocols should be followed at all times to minimize risks

• Proper training and education on handling equipment and chemicals is essential

• Wearing appropriate personal protective equipment (PPE) such as gloves, goggles, and lab coats is crucial

• Regular maintenance and inspection of equipment to ensure they are in good working condition

• Proper disposal of...read more

Quick sort is a popular sorting algorithm that uses a divide-and-conquer approach to sort an array efficiently.

• Divide the array into two sub-arrays based on a pivot element

• Recursively sort the sub-arrays

• Combine the sorted sub-arrays to get the final sorted array

• Example: [3, 6, 8, 10, 1, 2, 1] -> [1, 1, 2, 3, 6, 8, 10]

Risk management at site involves identifying, assessing, and mitigating potential risks to ensure the safety and security of residents and property.

• Conduct regular risk assessments to identify potential hazards and vulnerabilities

• Implement safety protocols and procedures to mitigate risks

• Train staff and residents on emergency response plans

• Maintain proper insurance coverage for liability protection

• Regularly inspect and maintain property to prevent accidents and injuries

A router is a networking device that forwards data packets between computer networks.

• Routers operate at the network layer of the OSI model.

• They use routing tables to determine the best path for data packets to reach their destination.

• Routing involves selecting paths in a network along which to send network traffic.

• Routers can connect different types of networks, such as LANs and WANs.

• Examples of routers include Cisco routers, Juniper routers, and TP-Link routers.

The method name in a Functional Interface (FI) is the name of the abstract method defined in the interface.

• The method name in a Functional Interface is the name of the single abstract method defined in the interface.

• For example, in the Functional Interface 'Runnable', the method name is 'run'.

• The method name is used to implement the functional interface using lambda expressions.