70+ Graduate Apprentice Trainee Interview Questions and Answers

Answers to questions related to electrical engineering.

• Higher voltage is preferred for transportation to reduce power loss and increase efficiency.

• House wiring is done in parallel to ensure that if one appliance fails, others can still function.

• Transformers are designed with safety features such as overcurrent protection and grounding to prevent electrical hazards.

• Doubly excited motors are used in applications where high torque and precise control are required.

• Neutral is a cu...read more

The flywheel is a mechanical device that stores rotational energy and helps in maintaining the engine's speed and stability.

• The flywheel is connected to the crankshaft of the engine and stores excess energy during the power stroke.

• During the compression stroke, the stored energy in the flywheel helps in maintaining the engine's momentum and smooth operation.

• The flywheel also acts as a rotational inertia, reducing speed fluctuations and providing a consistent power output.

• A sm...read more

Heat is transferred in convection through the movement of a fluid medium.

• Convection is a mode of heat transfer that occurs in fluids (liquids or gases).

• Heat is transferred through the movement of the fluid particles.

• Hot fluid rises, creating a convection current, while cold fluid sinks.

• Examples of convection include boiling water, wind, and ocean currents.

Three point linkage is a mechanism used in tractors to connect and control implements, providing stability and flexibility.

• Three point linkage is a system of three hydraulic arms that connect the tractor to an implement.

• It allows the implement to be raised, lowered, and tilted as needed.

• The three points of connection provide stability and prevent the implement from swaying or tipping.

• The top link controls the vertical movement, while the lower links control the lateral moveme...read more

To handle a worker not obeying instructions, address the issue directly, provide clear expectations, offer support and guidance, and consider disciplinary actions if necessary.

• Communicate with the worker to understand the reasons for not obeying instructions

• Reiterate the importance of following instructions and the impact on the team and organization

• Provide clear and specific instructions, ensuring they are understood

• Offer support and guidance to help the worker meet expectat...read more

Wet brakes are more efficient than dry brakes due to better heat dissipation and reduced wear and tear.

• Wet brakes have a cooling effect due to the presence of water, which helps in dissipating heat generated during braking.

• Wet brakes also have reduced wear and tear as the water acts as a lubricant, reducing friction between the brake pads and the rotor.

• Dry brakes, on the other hand, generate more heat and can cause brake fade, reducing their efficiency.

• Examples of wet brakes ...read more

1st angle and 3rd angle projection are two methods used in technical drawing to represent three-dimensional objects on a two-dimensional surface.

• 1st angle projection is commonly used in Europe and Asia, while 3rd angle projection is commonly used in North America.

• In 1st angle projection, the object is imagined to be in the first quadrant and the views are projected onto the planes surrounding the object.

• In 3rd angle projection, the object is imagined to be in the third quadra...read more

To restart a diesel engine, check fuel supply, battery, and starter motor. Bleed the fuel system if necessary.

• Check fuel supply and ensure there is enough fuel in the tank

• Check the battery and starter motor for any issues

• If the engine is not getting fuel, bleed the fuel system to remove any air pockets

• Check for any loose connections or damaged wires

• If all else fails, seek professional help

Symbols on a drawing sheet represent various elements or actions in a visual representation.

• Symbols provide a concise way to convey information in technical drawings.

• They can represent objects, dimensions, materials, processes, or instructions.

• For example, a circle with an arrow can indicate a rotational movement.

• A triangle with a number can represent a specific angle.

• Symbols are standardized and universally understood in engineering and design fields.

Ammeter is used to measure small amounts of current.

• An ammeter is a device used to measure the flow of electric current in a circuit.

• It is connected in series with the circuit to measure the current.

• Ammeters have a low resistance to prevent any significant voltage drop.

• They are available in both analog and digital forms.

• Examples of ammeters include galvanometers, clamp meters, and multimeters.

Tires are black in color due to the presence of carbon black.

• Carbon black is added to the rubber during the manufacturing process to improve its strength and durability.

• It also helps to protect the tire from UV rays and heat.

• Tires without carbon black would be more susceptible to cracking and wearing out quickly.

• Other colors of tires are available, but they are less common and often used for aesthetic purposes only.

Types of pumps include centrifugal, positive displacement, and axial flow pumps. Each has a unique characteristic curve.

• Centrifugal pumps are commonly used in industrial applications and have a steep characteristic curve.

• Positive displacement pumps are used for high viscosity fluids and have a nearly constant flow rate.

• Axial flow pumps are used for low head, high flow rate applications and have a flat characteristic curve.

• Characteristic curves show the relationship between fl...read more

Ashok Leyland unit 2 is a manufacturing unit of Ashok Leyland located in Pantnagar, Uttarakhand.

• Ashok Leyland unit 2 is a part of Ashok Leyland, a leading commercial vehicle manufacturer in India.

• It is located in Pantnagar, Uttarakhand and was established in 2002.

• The unit manufactures a range of commercial vehicles including trucks, buses, and light commercial vehicles.

• It has a production capacity of 75,000 vehicles per annum.

• The unit has won several awards for its manufactur...read more

A power plant generates electricity by converting mechanical energy into electrical energy using a generator. The speed of the generator is controlled by a device called a governor.

• A power plant uses a fuel source, such as coal, natural gas, or nuclear energy, to heat water and produce steam.

• The steam drives a turbine, which is connected to a generator that produces electricity.

• The speed of the generator is controlled by a device called a governor, which regulates the amount ...read more

I am a graduate apprentice trainee. I have knowledge in electronics and electrical engineering.

• I have completed my graduation in electronics and electrical engineering.

• I have practical knowledge in designing and implementing electronic circuits.

• I am familiar with the concept of bridge rectifiers and their applications.

• Regarding the question, a bridge rectifier can be used with a tubelight to convert AC to DC.

• However, a ballast is required to limit the current and voltage to t...read more

Compression ratio is the ratio of the volume of the combustion chamber from its largest capacity to its smallest capacity.

• Compression ratio is an important factor in determining the efficiency and power output of an engine.

• In SI engines, the compression ratio is typically between 8:1 to 12:1.

• In CI engines, the compression ratio is typically between 14:1 to 25:1.

• Higher compression ratios lead to higher thermal efficiency and power output, but also require higher octane fuel in...read more

Temperature sensors measure temperature and provide feedback to control systems like DCS and PLCs to regulate valves using PID control.

• Temperature sensors are used to measure temperature in various applications.

• DCS (Distributed Control System) and PLC (Programmable Logic Controller) use temperature sensor feedback to regulate valves.

• PID (Proportional-Integral-Derivative) control is used to adjust valve position based on temperature sensor feedback.

• Different types of temperatu...read more

Module, pressure angle, addendum, and dedendum are terms used in gear design.

• Module is the measure of the size of a gear tooth.

• Pressure angle is the angle between the line of action and a tangent to the pitch circle.

• Addendum is the radial distance between the pitch circle and the top of the tooth.

• Dedendum is the radial distance between the pitch circle and the bottom of the tooth.

• These terms are important in designing gears that mesh correctly and transmit power efficiently.

Critical dimensions in drawing refer to the measurements that are essential for the proper functioning and fit of a component or product.

• Critical dimensions ensure that the component or product meets the required specifications and tolerances.

• These dimensions are crucial for the proper assembly and functioning of the parts.

• They are often specified with tight tolerances to ensure accuracy and reliability.

• Examples of critical dimensions include hole diameters, shaft lengths, an...read more

A boiler is a device used to generate steam or hot water for heating or power generation. There are various types of pumps used in boilers.

• A boiler is a closed vessel that heats water or other fluids to generate steam or hot water.

• It is commonly used in industries for heating purposes or to generate power.

• Boilers can be classified into different types based on their design and fuel used, such as fire-tube boilers, water-tube boilers, and electric boilers.

• Fire-tube boilers hav...read more

Distillation is a process of separating components of a mixture based on their boiling points. McCabe Thiele method is a graphical method used for designing distillation columns.

• Distillation is used in various industries such as petroleum, chemical, and food processing.

• There are two main types of distillation: batch distillation and continuous distillation.

• McCabe Thiele method is used to determine the number of theoretical plates required for a distillation column.

• The method ...read more

The interview questions were related to quality tools, rework, and automobile parts.

• Quality tools are used to ensure that the product meets the required standards.

• 8D report is a problem-solving approach used to identify, correct, and prevent problems.

• Rework can be done to fix the defects in the product.

• Automobile parts are the components used in the manufacturing of vehicles.

• Examples of automobile parts include engines, brakes, suspension, and steering systems.

A 4*4 vehicle is a four-wheel drive vehicle that uses all four wheels to provide power to the vehicle.

• A 4*4 vehicle is also known as a four-wheel drive vehicle.

• It uses all four wheels to provide power to the vehicle.

• This allows the vehicle to have better traction and control in off-road or slippery conditions.

• The working principle involves a transfer case that distributes power to both the front and rear axles.

• Examples of 4*4 vehicles include SUVs, pickup trucks, and off-road...read more

Strength of material refers to the ability of a material to withstand external forces without breaking or deforming.

• It is an important concept in engineering and physics

• It is measured in terms of stress and strain

• Factors that affect strength of material include temperature, pressure, and composition

• Examples of materials with high strength include steel and titanium

• Testing methods for strength of material include tensile testing and compression testing

The least count of screw gauge is the smallest measurement that can be read on the instrument.

• It is the difference between the pitch of the screw and the distance between two consecutive graduations on the circular scale.

• It is usually expressed in millimeters or fractions of millimeters.

• The least count of a screw gauge can vary depending on the instrument's design and purpose.

• For example, a micrometer screw gauge used for measuring small distances may have a least count of 0....read more

Our company produces a wide range of products for various industries.

• We produce consumer electronics such as smartphones and laptops.

• We also manufacture home appliances like refrigerators and washing machines.

• Our company produces industrial equipment such as generators and pumps.

• We have a line of automotive products including engines and transmissions.

• We also produce chemicals and materials for various applications.

The stipend and time period for the Graduate Apprentice Trainee position.

• The stipend and time period may vary depending on the company and industry.

• Generally, the stipend for Graduate Apprentice Trainees ranges from Rs. 8,000 to Rs. 15,000 per month.

• The time period for the training can be anywhere from 6 months to 1 year.

• Some companies may offer additional benefits such as accommodation and transportation.

• It's important to research the specific company and industry to get a b...read more

SCR is a semiconductor device used for power control. Freewheeling diode is used to protect the circuit from voltage spikes.

• SCR stands for Silicon Controlled Rectifier

• It is a four-layer PNPN diode

• It is used for power control in various applications such as motor control, lighting control, and heating control

• Freewheeling diode is also known as a flyback diode

• It is connected in parallel with an inductive load to protect the circuit from voltage spikes

• It allows the current to fl...read more

I have strong technical skills in programming and software development, as well as excellent communication and problem-solving abilities.

• Proficient in programming languages such as Java, Python, and C++

• Experience in software development and testing

• Strong analytical and problem-solving skills

• Excellent communication and interpersonal abilities

• Ability to work well in a team and independently

• Familiarity with project management tools and methodologies

The second law of thermodynamics states that the entropy of an isolated system always increases over time.

• Entropy always increases in a closed system

• Heat flows from hot to cold

• Efficiency of heat engines is limited by the second law

• Examples: melting ice, burning fuel

There are various types of gears such as spur, helical, bevel, worm, rack and pinion, etc.

• Spur gears have straight teeth and are used for low-speed applications

• Helical gears have angled teeth and provide smoother operation at higher speeds

• Bevel gears are used to transmit power between shafts that are at an angle to each other

• Worm gears are used for high reduction ratios and are self-locking

• Rack and pinion gears are used to convert rotational motion into linear motion

• Planetary...read more

Tolerance is the permissible limit of variation in a dimension or property of a material. Types of gears include spur, helical, bevel, worm, etc.

• Tolerance is the difference between the maximum and minimum limit of a dimension or property.

• It is important in manufacturing to ensure proper fit and function of parts.

• Types of gears include spur, helical, bevel, worm, rack and pinion, etc.

• Spur gears are the most common type and have straight teeth.

• Helical gears have angled teeth fo...read more

To handle fear of failure, one can acknowledge and accept the fear, set realistic goals, focus on learning and growth, seek support and feedback, and practice self-compassion.

• Acknowledge and accept the fear of failure as a normal and common emotion.

• Set realistic goals and break them down into smaller, achievable tasks.

• Focus on learning and growth rather than solely on the outcome.

• Seek support and feedback from mentors, colleagues, or friends.

• Practice self-compassion by being ...read more

Reflux ratio is used in distillation to optimize separation of components in a mixture.

• Reflux ratio is the ratio of the amount of condensed vapor that is returned to the distillation column to the amount of vapor that is allowed to leave the column.

• It is used to optimize the separation of components in a mixture by controlling the amount of reflux in the column.

• A higher reflux ratio results in a higher purity of the distillate, but also requires more energy to maintain.

• Conver...read more

Four stroke engines have four stages of operation while two stroke engines have two stages of operation.

• Four stroke engines have separate intake, compression, power, and exhaust strokes while two stroke engines combine intake and compression in one stroke and power and exhaust in another.

• Four stroke engines are more fuel efficient and produce less pollution than two stroke engines.

• Two stroke engines are simpler in design and have fewer moving parts than four stroke engines.

• Ex...read more

AC system in cars is a cooling system that regulates the temperature inside the car.

• AC system uses a compressor to compress refrigerant gas

• The compressed gas is then passed through a condenser to release heat

• The cooled gas is then passed through an evaporator to absorb heat from the car's interior

• The cooled air is then blown into the car's cabin through vents

• Examples of AC systems in cars include manual and automatic systems

I am a Graduate Apprentice Trainee with expertise in intersection and expected LPA.

• I have experience in analyzing and identifying intersections in various scenarios.

• I am skilled in using tools and techniques to optimize traffic flow at intersections.

• I have a strong understanding of traffic regulations and safety measures at intersections.

• I have successfully implemented intersection improvement projects during my previous internships.

• I am confident in my ability to contribute ...read more

Types of valves and SI unit of pressure are important concepts in mechanical engineering.

• Types of valves include gate, globe, ball, butterfly, and check valves.

• SI unit of pressure is Pascal (Pa).

• Other units of pressure include bar, psi, and atm.

• Valves are used to control the flow of fluids in pipelines and machinery.

• Different types of valves are used for different applications and operating conditions.

Hydraulic tests are used to check the strength and integrity of pipes and vessels under pressure.

• Hydrostatic test is a common type of hydraulic test used to check for leaks and structural integrity.

• Formula for hydrostatic test pressure is P = 2St/D, where P is pressure, S is stress, t is wall thickness, and D is diameter.

• Another type of hydraulic test is pneumatic test, which uses air or gas instead of liquid.

• Formula for pneumatic test pressure is P = 2St/D x K, where K is a ...read more

5S is a workplace organization method and 7QC is a quality control tool used in manufacturing.

• 5S focuses on organizing the workplace to improve efficiency and reduce waste.

• 7QC involves seven quality control tools used to identify and solve problems in manufacturing processes.

• Examples of 5S include sorting, simplifying, sweeping, standardizing, and self-discipline.

• Examples of 7QC tools include Pareto charts, cause-and-effect diagrams, and control charts.

There are two main routes for the production of TiO2: sulfate and chloride process.

• Sulfate process involves reacting titanium ores with sulfuric acid to produce a solution of titanium sulfate, which is then hydrolyzed to form TiO2.

• Chloride process involves reacting titanium ores with chlorine gas to form titanium tetrachloride, which is then oxidized to form TiO2.

• Both processes involve purification and calcination steps to produce the final TiO2 product.

• Sulfate process is mor...read more

The angle for different gears depends on their type and purpose.

• The angle between two gears is determined by the number of teeth on each gear.

• The angle can be calculated using the formula: angle = (360 / number of teeth on gear) * (number of teeth on mating gear).

• The angle can also be affected by the pressure angle and helix angle of the gears.

• Different types of gears have different angles, such as spur gears, bevel gears, and worm gears.

A pump is a mechanical device used to move fluids from one place to another. There are various types of pumps.

• Positive displacement pumps

• Centrifugal pumps

• Axial flow pumps

• Mixed flow pumps

• Jet pumps

• Gear pumps

• Diaphragm pumps

• Peristaltic pumps

• Rotary vane pumps

• Screw pumps

Liquid and nitrogen gas differ in their physical state and boiling points.

• Liquid nitrogen is nitrogen in a liquid state at an extremely low temperature of -196°C.

• Nitrogen gas is a colorless, odorless gas that makes up 78% of the Earth's atmosphere.

• Liquid nitrogen is commonly used in cryogenics, food preservation, and medical procedures.

• Nitrogen gas is used in various industries such as electronics, food packaging, and metal fabrication.

• The boiling point of liquid nitrogen is ...read more

Chemical engineering involves the design, development, and operation of chemical processes and equipment.

• Chemical engineering applies principles of chemistry, physics, and mathematics to solve problems related to the production and use of chemicals and materials.

• Process design involves selecting the appropriate equipment, materials, and operating conditions to achieve the desired product quality and quantity.

• Chemical engineers work in a variety of industries, including pharma...read more

On load tap changer is a device used to vary the turns ratio of a transformer while it is energized.

• It is used to regulate the voltage output of a transformer.

• It is typically used in power transformers.

• It allows for voltage regulation without interrupting the power supply.

• It works by adjusting the number of turns in the transformer winding.

• Examples include the LTC in a distribution transformer and the OLTC in a power transformer.

Grinding is a process of removing material from a workpiece using an abrasive wheel or belt.

• Grinding is used to achieve high dimensional accuracy and surface finish.

• It is commonly used in manufacturing industries for finishing operations.

• Different types of grinding machines are used for different applications such as cylindrical, surface, and centerless grinding.

• Grinding can be done manually or with the help of computer numerical control (CNC) machines.

• Examples of products th...read more

Refrigerators work by removing heat from the interior and expelling it to the exterior.

• Refrigerators use a refrigerant to absorb heat from the interior and release it outside

• The refrigerant is compressed to increase its temperature and then allowed to expand, which cools it down

• The cooled refrigerant absorbs heat from the interior of the refrigerator, lowering its temperature

• The heat absorbed by the refrigerant is then expelled to the exterior of the refrigerator

• The process i...read more