30+ Interview Questions and Answers

Air is interned in the combustion chamber during the intake stroke.

• During the intake stroke, the piston moves down and air is drawn into the combustion chamber.

• This air is then mixed with fuel and ignited during the compression stroke.

• The resulting explosion pushes the piston down, which drives the crankshaft and produces power.

• The exhaust stroke then expels the spent gases from the combustion chamber.

• This four-stroke cycle is repeated continuously to power the engine.

The cost of Ceria bed used in the design of a catalytic converter is lower than the bed used in available catalytic converters.

• Ceria is a cost-effective material for catalytic converters.

• It is widely used in the automotive industry due to its affordability.

• Compared to other beds used in catalytic converters, Ceria offers a more economical solution.

• The lower cost of Ceria bed does not compromise the performance of the catalytic converter.

The rectangle will have greater load bearing capacity in the vertical position.

• The load bearing capacity of a rectangle depends on its orientation.

• In the vertical position, the weight is distributed along the longer side, resulting in greater load bearing capacity.

• In the horizontal position, the weight is distributed along the shorter side, resulting in lower load bearing capacity.

• The vertical position allows for better weight distribution and stability.

• Examples: A bookshelf ...read more

I would choose Design over Testing.

• Design allows for creativity and innovation.

• Design involves problem-solving and critical thinking.

• Design offers the opportunity to create new products or improve existing ones.

• Design requires collaboration and communication with cross-functional teams.

• Design offers long-term career growth and advancement opportunities.

GD&T stands for Geometric Dimensioning and Tolerancing. It is used to define and communicate engineering tolerances.

• GD&T is a symbolic language used to specify the size, shape, orientation, and location of features on a part.

• It ensures that parts are manufactured to the correct dimensions and fit together properly.

• GD&T is used in quality to improve communication between design, engineering, and manufacturing teams.

• It helps to reduce errors, increase efficiency, and improve pr...read more

The inlet valve is opened before TDC to allow fresh air-fuel mixture into the combustion chamber. The spark plug is positioned at a specific angle for efficient combustion.

• Opening the inlet valve before TDC ensures that the piston is moving downwards, creating a pressure difference that helps in drawing the air-fuel mixture into the combustion chamber.

• This timing also allows for better mixing of the air and fuel, leading to improved combustion efficiency.

• The spark plug is pos...read more

The least count of a vernier caliper is the smallest measurement that can be read on the scale.

• The least count is determined by the number of divisions on the vernier scale and the main scale.

• It is usually expressed in fractions of a millimeter or inch.

• For example, a vernier caliper with 20 divisions on the vernier scale and 1mm on the main scale has a least count of 0.05mm.

• The least count is important for accurate measurements and should be considered when selecting a calipe...read more

Two stroke engines complete a power cycle in one revolution, while four stroke engines complete it in two revolutions.

• Two stroke engines have a simpler design and are lighter than four stroke engines.

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

• Two stroke engines are commonly used in small power tools and motorcycles, while four stroke engines are used in cars and larger machinery.

• In a two stroke engine, the fuel and air mixtu...read more

Changing the angle can have various effects depending on the context.

• Changing the angle can alter the direction or trajectory of a moving object.

• In physics, changing the angle of incidence can affect the amount of reflection or refraction of light.

• In engineering, changing the angle of a structural component can affect its stability or load-bearing capacity.

• In mathematics, changing the angle can affect the trigonometric functions and their values.

• In sports, changing the angle ...read more

A S.I./C.I. engine is a type of internal combustion engine that operates on either spark ignition or compression ignition.

• S.I. engine stands for Spark Ignition engine, where the fuel-air mixture is ignited by a spark plug.

• C.I. engine stands for Compression Ignition engine, where the fuel-air mixture is ignited by the heat of compression.

• In a S.I. engine, the fuel-air mixture is drawn into the cylinder during the intake stroke, compressed during the compression stroke, ignited...read more

Casting is a manufacturing process in which a liquid material is poured into a mold, allowed to solidify, and then removed from the mold.

• The liquid material can be metal, plastic, or ceramic.

• The mold is typically made of sand, plaster, or metal.

• The casting process can be used to create complex shapes and parts.

• Examples of cast parts include engine blocks, turbine blades, and jewelry.

• The process can be done using gravity, pressure, or vacuum to fill the mold.

• Casting defects ca...read more

Forging is a manufacturing process where metal is shaped by applying compressive forces using a hammer or press.

• Metal is heated to a high temperature to make it malleable

• The metal is then shaped using a hammer or press

• Forging can be done using different techniques such as open die forging, closed die forging, and seamless ring rolling

• Forging is used to create high-strength components for various industries such as aerospace, automotive, and construction

MS Excel commands used?

• Data sorting and filtering

• Conditional formatting

• Pivot tables and charts

• VLOOKUP and HLOOKUP functions

• IF and SUM functions

Transmission energy loss in a vehicle can be calculated by considering factors like friction, heat generation, and mechanical inefficiencies.

• Calculate energy loss due to friction between moving parts

• Consider heat generation from components like the transmission fluid

• Account for mechanical inefficiencies in the transmission system

• Total the energy losses to get an overall estimate

There are two types of electricity: direct current (DC) and alternating current (AC).

• Direct current (DC) flows in one direction and is commonly used in batteries and electronic devices.

• Alternating current (AC) constantly changes direction and is used in homes and businesses for powering appliances and lighting.

• Other types of electricity include static electricity, which is the buildup of electric charge on an object, and current electricity, which is the flow of electric char...read more

A braking system is designed to slow down or stop the motion of a vehicle or object.

• Braking systems use friction to convert kinetic energy into heat energy.

• Common types of braking systems include disc brakes, drum brakes, and regenerative brakes.

• Disc brakes use calipers and brake pads to clamp down on a rotating disc, creating friction and slowing down the vehicle.

• Drum brakes use brake shoes that press against the inside of a drum to slow down the vehicle.

• Regenerative brakes ...read more

Types of gear include spur, helical, bevel, and rack and pinion. Superchargers and turbochargers are used to increase engine power.

• Types of gear: spur, helical, bevel, rack and pinion

• Rack and pinion gear is used to convert rotational motion into linear motion

• Supercharger and turbocharger are used to increase engine power by forcing more air into the combustion chamber

• Supercharger is belt-driven while turbocharger is exhaust-driven

I can contribute in quality management by implementing quality control measures, conducting regular audits, and ensuring compliance with industry standards.

• Implementing quality control measures to ensure that products meet or exceed customer expectations

• Conducting regular audits to identify areas for improvement and ensure compliance with industry standards

• Developing and implementing training programs to educate employees on quality management principles

• Collaborating with cro...read more

Differential is a mathematical concept that refers to the rate of change of a function with respect to its variables.

• It is used to calculate the slope of a curve at a given point

• It is an important concept in calculus and is used to solve problems related to optimization, motion, and rates of change

• Examples include finding the maximum or minimum value of a function, determining the velocity of an object, and calculating the rate of change of a population over time

There are various types of electrical motors and transformers, each with their own unique wiring diagrams.

• Types of electrical motors include AC motors, DC motors, stepper motors, and servo motors.

• Transformers can be step-up, step-down, isolation, autotransformers, etc.

• Wiring diagrams vary depending on the specific motor or transformer being used.

• AC motors typically have a capacitor and a start winding in their wiring diagram.

• DC motors have a commutator and brushes in their wi...read more

ECA, ECP, and PCW are abbreviations related to manufacturing engineering.

• ECA stands for Engineering Change Authorization, which is a formal process to document and approve changes to a product or process.

• ECP stands for Engineering Change Proposal, which is a formal document that outlines proposed changes to a product or process.

• PCW stands for Process Change Worksheet, which is a document used to record and track changes made to manufacturing processes.

• These terms are commonly...read more

An engine is a machine that converts fuel into mechanical energy to power vehicles or machinery. There are various types of engines such as internal combustion, electric, and steam engines.

• An engine is a machine that burns fuel to produce mechanical energy.

• Types of engines include internal combustion engines, electric motors, and steam engines.

• Internal combustion engines are commonly used in cars, motorcycles, and small aircraft.

• Electric motors are used in electric vehicles a...read more

Ball lightning

• Ball lightning is a rare and mysterious atmospheric phenomenon.

• It appears as a glowing sphere of light that can move erratically and last for several seconds.

• It is considered dangerous due to its unpredictable behavior and potential to cause damage.

• Ball lightning has been reported to pass through walls, explode, and even cause fires.

• Scientists are still studying its nature and trying to understand its origins.

I have a strong foundation in computer knowledge and am proficient in various software and operating systems.

• Proficient in Microsoft Office Suite

• Familiar with Windows and Mac operating systems

• Experience with troubleshooting software and hardware issues

• Knowledge of programming languages such as Java and Python

2 wheel drive vehicles use power from the engine to move either the front or rear wheels, while 4 wheel drive vehicles use power from the engine to move all four wheels.

• 2 wheel drive vehicles are typically lighter and more fuel efficient than 4 wheel drive vehicles.

• 4 wheel drive vehicles provide better traction and stability in off-road or slippery conditions.

• Examples of 2 wheel drive vehicles include most sedans and some SUVs, while examples of 4 wheel drive vehicles include...read more

Shot blasting is a surface treatment process used to clean, strengthen, or polish metal surfaces.

• Involves propelling abrasive materials at high speeds onto the surface being treated

• Removes rust, scale, and other contaminants from metal surfaces

• Used in industries like automotive, aerospace, and construction

• Examples include cleaning old paint off metal surfaces before repainting

Line balancing is the process of optimizing workstations in a production line to minimize idle time and maximize efficiency.

• It involves analyzing the production process and identifying bottlenecks

• Tasks are then rearranged to balance the workload across workstations

• The goal is to achieve a smooth and continuous flow of work

• Example: In a car assembly line, line balancing would involve ensuring that each workstation has an equal amount of work to do

• Example: In a restaurant kitch...read more

Technical line in tractor service involves diagnosing and repairing mechanical and electrical issues in tractors.

• Performing routine maintenance on tractors

• Identifying and troubleshooting mechanical and electrical issues

• Repairing or replacing faulty parts

• Testing and adjusting tractor systems

• Maintaining accurate records of service and repairs

• Communicating with customers to understand their needs and provide solutions

• Staying up-to-date with new technologies and industry trends

My aspect CTC is to secure a competitive salary package that reflects my skills, qualifications, and experience as a Diploma Mechanical Engineer.

• I am looking for a CTC that aligns with industry standards and my level of expertise.

• I expect my CTC to be commensurate with my educational background and the responsibilities of the role.

• I am open to negotiation based on the company's compensation structure and benefits package.

• I value fair compensation that recognizes my contributi...read more

Management is the process of planning, organizing, directing, and controlling resources to achieve organizational goals.

• It involves setting goals and objectives

• Organizing resources such as people, materials, and finances

• Directing and motivating employees to achieve goals

• Controlling and evaluating performance to ensure goals are met

• Examples include project management, operations management, and human resource management

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

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

• Helical gears have angled teeth for smoother and quieter operation.

• Bevel gears have cone-shaped teeth and are used to change the direction of rotation.

• Worm gears have a screw-like appearance and provide high gear reduction ratios.

• Rack and pinion gears convert rotational motion into linear moti...read more