700+ Engineer Trainee Interview Questions and Answers

The material used for grinding wheel is abrasive grains held together by a bonding material.

• Grinding wheels are made of abrasive grains such as aluminum oxide, silicon carbide, and diamond

• The abrasive grains are held together by a bonding material such as clay, resin, rubber, or metal

• The type of abrasive and bonding material used depends on the application and the material being ground

• Grinding wheels are used for various applications such as sharpening tools, removing materia...read more

The operating system in Apple phones is iOS.

• iOS is a mobile operating system developed by Apple Inc.

• It is the second most popular mobile operating system in the world.

• iOS is known for its user-friendly interface and security features.

• Examples of Apple phones that run on iOS are iPhone 12, iPhone 11, and iPhone SE.

Program to print prime numbers

• Start with a loop from 2 to n (number to check)

• For each number, check if it is divisible by any number from 2 to its square root

• If not divisible, it is a prime number and print it

Electrical engineering deals with power generation and distribution, while electronics engineering deals with electronic devices and circuits.

• Electrical engineering focuses on large-scale power generation and distribution systems, such as power plants and electrical grids.

• Electronics engineering focuses on small-scale electronic devices and circuits, such as computers, smartphones, and microchips.

• Electrical engineering involves working with high voltage and current systems, w...read more

PLC stands for Programmable Logic Controller. It is a digital computer used for automation of electromechanical processes.

• Start by understanding the basics of ladder logic programming

• Learn the specific programming software used by the PLC manufacturer

• Understand the input/output modules and their functions

• Test and debug the program thoroughly before implementation

The critical temperature of steel is the temperature at which it loses its magnetic properties.

• The critical temperature of steel is around 770°C (1420°F).

• Above this temperature, steel becomes non-magnetic and undergoes a phase change.

• The critical temperature varies depending on the type of steel and its composition.

Creep is the slow, time-dependent deformation of a material under constant load, while fatigue is the weakening of a material due to repeated loading and unloading.

• Creep is a time-dependent phenomenon, while fatigue is a cyclic phenomenon.

• Creep occurs at high temperatures and constant stress, while fatigue occurs at lower temperatures and varying stress levels.

• Creep leads to permanent deformation, while fatigue can lead to crack initiation and propagation.

• Examples of creep in...read more

The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time.

• Entropy in a closed system tends to increase over time

• Heat energy naturally flows from hot to cold objects

• Efficiency of energy conversion processes is limited by the second law of thermodynamics

In STAAD, I have experience in performing structural analysis and design. For reinforcement calculations, I use the design codes and specifications to determine the required reinforcement quantities.

• Performed structural analysis and design using STAAD software

• Utilized design codes and specifications to determine required reinforcement quantities

• Considered factors such as material properties, loading conditions, and safety factors

• Checked and verified the reinforcement calculat...read more

To make a transistor, semiconductor material can be used to create a structure with three layers: emitter, base, and collector.

• Start by doping the semiconductor material with impurities to create the different layers.

• Use lithography and etching techniques to define the structure of the transistor.

• Add metal contacts to the different layers to allow for electrical connections.

• Test the transistor to ensure proper functionality and characteristics.

• Examples: Silicon can be doped w...read more

Parameters measured in engineering and methods used for measurement

• Parameters measured include dimensions, temperature, pressure, flow rate, and electrical properties

• Methods used for measurement include rulers, thermocouples, pressure gauges, flow meters, and multimeters

• Calibration of instruments is important for accurate measurements

• Data acquisition systems can be used for continuous monitoring and recording of measurements

Stress and strain are key concepts in civil engineering, with steel commonly used in construction for its strength and durability.

• Stress is the force applied to a material, while strain is the resulting deformation or change in shape.

• Steel is typically utilized in construction for its high tensile strength and durability.

• Common locations where steel is used in construction include beams, columns, reinforcement in concrete structures, and bridges.

• Steel is also used in the cons...read more

Types of steel include carbon steel, alloy steel, stainless steel, and tool steel. They can be differentiated based on their composition, properties, and applications.

• Carbon steel contains primarily carbon and iron, with low amounts of other elements. It is commonly used in construction and manufacturing.

• Alloy steel contains additional elements such as manganese, silicon, and copper to enhance its properties. It is used in automotive and aerospace industries.

• Stainless steel c...read more

Control panel is a device used to control and monitor various systems and processes. It is associated with tasks such as setting parameters, monitoring performance, and troubleshooting.

• Control panel is used to control and monitor various systems and processes

• Tasks associated with control panel include setting parameters, monitoring performance, and troubleshooting

• Examples of control panels include those used in industrial automation, HVAC systems, and electrical power distrib...read more

Neutral and earth are two different components of an electrical system.

• Neutral wire carries current back to the source in a balanced electrical circuit.

• Earth wire is a safety measure to protect against electrical faults and provide a path for current to flow to the ground.

• Neutral wire is connected to the center tap of the transformer, while earth wire is connected to the ground.

• Neutral wire carries current under normal operating conditions, while earth wire carries current on...read more

Vibrators are used to generate vibrations for various purposes.

• Vibrators are commonly used in construction to compact concrete and remove air bubbles.

• They are also used in industrial applications to facilitate material flow in hoppers and chutes.

• In the field of electronics, vibrators are used in devices like cell phones to provide haptic feedback.

• Vibrators are used in sexual wellness products for stimulation and pleasure.

• They can also be used in medical settings for therapeut...read more

Bending moment is a measure of the bending effect on a beam, shear force is the force perpendicular to the beam's axis, and buckling is a sudden failure due to compression.

• Bending moment is the algebraic sum of moments about the neutral axis of a section subjected to external loads.

• Shear force is the force perpendicular to the beam's longitudinal axis, causing it to shear or slide.

• Buckling is a sudden failure mode in which a structural member fails due to compressive stress e...read more

Interface in Java defines a set of methods that a class must implement.

• Interface in Java is a blueprint of a class. It only contains method signatures without the body.

• Classes can implement multiple interfaces but can only extend one class.

• Example: interface Animal { void eat(); } class Dog implements Animal { public void eat() { System.out.println("Dog is eating"); }}

We use sample over population to save time, money and resources.

• Sampling is less time-consuming and cost-effective than studying the entire population.

• Sampling helps to reduce errors and biases that may occur in studying the entire population.

• Sampling is useful when the population is too large to study in its entirety.

• Sampling can provide accurate results if the sample is representative of the population.

The future of the automobile industry in India is promising with the rise of electric vehicles, autonomous driving technology, and increased focus on sustainability.

• Electric vehicles (EVs) are gaining popularity in India due to government incentives and growing environmental concerns.

• Autonomous driving technology is expected to revolutionize the automobile industry, making transportation safer and more efficient.

• The shift towards sustainable practices, such as the use of rene...read more

Electrical safety measures in substation include wearing protective gear, following safety procedures, and de-energizing equipment before maintenance.

• Wear appropriate personal protective equipment (PPE) such as gloves, safety glasses, and hard hats.

• Follow safety procedures and warning signs posted in the substation.

• De-energize equipment before performing maintenance or repairs.

• Use lockout/tagout procedures to prevent accidental energization.

• Maintain a safe distance from energ...read more

Fy in steel indicates the yield strength of the material.

• Fy is a parameter used to measure the stress at which a material begins to deform plastically.

• It represents the maximum stress a material can withstand before permanent deformation occurs.

• Fy is typically expressed in units of force per unit area, such as pounds per square inch (psi) or megapascals (MPa).

• Knowing the Fy of a steel is important for structural design and determining the load-bearing capacity of a component....read more

Main bars are provided in the bottom of the beam to resist tensile forces.

• Main bars are placed at the bottom of the beam to resist tensile forces.

• The spacing and size of the bars depend on the load and span of the beam.

• In simply supported beams, main bars are provided at the bottom of the beam.

• In cantilever beams, main bars are provided at the bottom of the beam and extended into the supporting structure.

• Main bars are usually made of steel and are placed parallel to the lengt...read more

Traditional machines are manually operated while non-traditional machines are automated.

• Traditional machines are operated by human power while non-traditional machines are powered by electricity or other sources.

• Non-traditional machines are more efficient and accurate than traditional machines.

• Examples of traditional machines include lathe machines, drilling machines, and milling machines while examples of non-traditional machines include CNC machines, 3D printers, and robots...read more

DC current flows in one direction while AC current changes direction periodically. Neither is more powerful, they serve different purposes.

• DC current is used in batteries and electronic devices that require a steady flow of electricity in one direction.

• AC current is used in homes and businesses to power appliances and electronics that require a changing flow of electricity.

• Neither current is more powerful, as they serve different purposes and are measured in different units (...read more

Basic electronics components include resistors, capacitors, diodes, transistors, and integrated circuits.

• Resistors: Used to control the flow of electric current.

• Capacitors: Store and release electrical energy.

• Diodes: Allow current to flow in one direction.

• Transistors: Amplify or switch electronic signals.

• Integrated Circuits: Contain multiple electronic components on a single chip.

Questions related to hydraulic circuit, turret alignment, lubrication cartridge and previous machines worked on.

• Explained the working of hydraulic circuit and drew a schematic diagram

• Described the process of turret alignment and its importance in machining

• Explained the function of lubrication cartridge and its maintenance

• Listed the machines worked on in previous firm and their specific roles

• Provided examples of successful projects completed using these machines

Units of pressure include pascal, atmosphere, bar, torr, and psi.

• Pascal (Pa) is the SI unit of pressure, equal to one newton per square meter.

• Atmosphere (atm) is the pressure exerted by the weight of the Earth's atmosphere at sea level.

• Bar is a unit of pressure equal to 100,000 pascals.

• Torr is a unit of pressure based on the pressure exerted by a column of mercury 1 millimeter high.

• Pound per square inch (psi) is a unit of pressure commonly used in the United States.

Vapour is the gaseous state of a substance below its critical temperature, while steam specifically refers to the gaseous state of water.

• Vapour can refer to the gaseous state of any substance, while steam specifically refers to water in the gaseous state.

• Vapour is formed when a substance evaporates or sublimes, while steam is produced when water is heated to its boiling point.

• Vapour can exist at temperatures below the boiling point of a substance, while steam is always at the...read more

A boiler is a closed vessel in which water or other fluid is heated. 2 level control of boiler involves maintaining water level. Cv is a formula for valve capacity. Different types of pressure gauges include bourdon tube, diaphragm, and digital.

• Boiler is a closed vessel used to heat water or other fluids.

• 2 level control of boiler involves maintaining water level at two different points to ensure safe operation.

• Cv is the formula for valve capacity and is calculated as the flow...read more

A bill of materials (BOM) is a comprehensive list of all the components, parts, and materials required to build or manufacture a product.

• BOM includes detailed information about each item such as part number, description, quantity, and unit of measure.

• It helps in tracking and managing the inventory of components and materials.

• BOM is used in production planning, cost estimation, and procurement processes.

• It ensures accurate and consistent assembly of the product.

• BOM can also in...read more

Effective strategies for managing challenging situations include staying calm, problem-solving, seeking support, and maintaining a positive attitude.

• Stay calm and composed to think clearly and make rational decisions

• Identify the root cause of the challenge and develop a plan to address it

• Seek advice and support from colleagues, mentors, or supervisors

• Maintain a positive attitude and focus on finding solutions rather than dwelling on the problem

• Practice self-care and stress ma...read more

I am a computer science graduate with a strong foundation in database and data structures.

• I have completed courses in database management systems and data structures

• I have hands-on experience in working with SQL and NoSQL databases

• I have implemented various data structures such as linked lists, stacks, and queues in my projects

• I am familiar with algorithms such as binary search, sorting, and searching

• I am always eager to learn and explore new technologies in this field

Microcontroller is a small computer on a single integrated circuit. Microprocessor is a central processing unit of a computer.

• Microcontroller is a complete computer system on a chip, with memory, input/output peripherals, and a processor.

• Microprocessor is a single chip CPU that performs arithmetic and logic operations.

• Microcontroller is used in embedded systems, while microprocessors are used in personal computers.

• Examples of microcontrollers include Arduino, PIC, and AVR, wh...read more

Power factor is the ratio of real power to apparent power. Three phase electricity has three conductors while single phase has one.

• Power factor is a measure of how efficiently electrical power is being used.

• It is calculated as the ratio of real power (measured in watts) to apparent power (measured in volt-amperes).

• A power factor of 1 means all the power is being used efficiently, while a power factor of 0 means no power is being used.

• Three phase electricity has three conducto...read more

There are 10,000 microns in one centimetre.

• 1 centimetre = 10 millimetres

• 1 millimetre = 1,000 microns

• Therefore, 1 centimetre = 10,000 microns

WordPress is a popular content management system used to create websites. To upload a website to a live server, you can use FTP or a hosting provider's control panel.

• WordPress is a free and open-source platform for creating websites and blogs.

• To upload a website to a live server, you can use FTP (File Transfer Protocol) to transfer files from your local computer to the server.

• Many hosting providers also offer control panels like cPanel or Plesk, where you can upload your webs...read more

Cantilever beams are beams that are supported at only one end, creating a overhanging structure. Shaper machines are used for cutting and shaping materials. Circular roads cannot be created using a shaper machine.

• Cantilever beams are beams that are supported at one end and have a overhanging structure.

• Shaper machines are used for cutting and shaping materials like metal, wood, or plastic.

• Creating a circular road requires specialized equipment like a road paver or asphalt roll...read more

There are three types of cooling towers: natural draught, forced draught, and induced draught.

• Natural draught cooling towers use the natural convection of air to cool water.

• Forced draught cooling towers use fans to force air through the tower.

• Induced draught cooling towers use fans to draw air through the tower.

• The choice of cooling tower type depends on factors such as the size of the plant, the cooling requirements, and the local climate.

• Cooling towers are commonly used in ...read more

In Java, a class is a blueprint for creating objects. It defines the properties and behaviors of objects.

• A class in Java is a template for creating objects, which encapsulates data for the object and methods to manipulate that data.

• Classes are defined using the 'class' keyword followed by the class name.

• Example: class Car { private String color; public void setColor(String c) { color = c; } }

The distance between left and right tracks varies depending on the railway system and location.

• The distance between left and right tracks is known as gauge.

• Standard gauge for railways is 4 feet 8.5 inches.

• In India, the gauge for most railways is 5 feet 6 inches.

• Some railways have different gauges for different tracks.

• The distance between tracks can also vary based on the type of train and its speed.

Spot welding is a process of joining two or more metal parts by applying heat and pressure at specific spots. CO2 welding, also known as MIG welding, is a process of joining metals using a consumable electrode and a shielding gas.

• Spot welding is commonly used in the automotive industry to join sheet metal parts.

• CO2 welding is widely used in manufacturing industries for its versatility and speed.

• Spot welding creates localized heat at the joint, while CO2 welding provides a con...read more

3D modeling allows for visualization, simulation, and optimization of designs.

• Enables designers to see the final product before production

• Helps identify potential issues and make necessary changes

• Allows for testing and simulation of different scenarios

• Can improve communication and collaboration among team members

• Can reduce costs and time in the design process

An electromagnetic flowmeter is a device used to measure the flow rate of conductive liquids in a pipe by inducing a magnetic field and measuring the voltage generated.

• Works based on Faraday's law of electromagnetic induction

• Suitable for measuring flow rates of conductive liquids like water, acids, and slurries

• Commonly used in industries such as water treatment, chemical processing, and food & beverage

• Provides accurate and reliable measurements even in harsh environments

• Not s...read more

I have utilized networking concepts in projects by implementing client-server communication, setting up network configurations, and troubleshooting network issues.

• Implemented client-server communication using sockets in a chat application project

• Configured network settings such as IP addresses and ports for a web server project

• Troubleshooted network issues like latency and packet loss in a network monitoring tool project

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Inheritance allows for code reusability and promotes the concept of hierarchy in programming.

• Example: A 'Car' class can inherit properties and behaviors from a 'Vehicle' class.

• Subclasses can override inherited methods to provide specific implementations.

• Inheritance can create a parent-child relationship between classes.

• Inheritance helps in achieving polym...read more

The 'static' keyword is used in programming to declare variables, functions, or classes that retain their values or state across multiple function calls or instances.

• Static variables are initialized only once and retain their values throughout the program's execution.

• Static functions can only access other static variables and functions within the same class.

• Static classes cannot be instantiated and are used to provide utility functions or constants.

• Static keyword can also be ...read more