200+ Diploma Mechanical Engineer Interview Questions and Answers

The components of a lathe include the bed, headstock, tailstock, carriage, chuck, tool post, and feed mechanism.

• Bed: The base of the lathe that provides support and rigidity.

• Headstock: Contains the main spindle and gears for controlling the speed of rotation.

• Tailstock: Supports the other end of the workpiece and can be moved along the bed.

• Carriage: Moves along the bed and holds the cutting tool.

• Chuck: Holds the workpiece securely in place.

• Tool post: Holds the cutting tool and...read more

Work in piston refers to the force exerted by the expanding gases on the piston during the power stroke.

• During the power stroke, fuel is ignited in the combustion chamber, which creates a high-pressure gas that pushes the piston down.

• The force exerted by the expanding gases on the piston is what produces the work output of the engine.

• The work done by the piston is transferred to the crankshaft, which converts the linear motion of the piston into rotational motion.

• The amount o...read more

Without work planning, there will be chaos, inefficiency, missed deadlines, and increased costs.

• Chaos and confusion in the workflow

• Inefficiency in task execution

• Missed deadlines and project delays

• Increased costs due to rework or resource wastage

Hooke's law states that the force needed to extend or compress a spring is directly proportional to the distance it is stretched or compressed.

• Hooke's law is named after the English scientist Robert Hooke.

• It is commonly used to describe the behavior of springs and elastic materials.

• The law can be mathematically expressed as F = kx, where F is the force applied, k is the spring constant, and x is the displacement.

• Hooke's law applies within the elastic limit of a material, beyo...read more

Petrol engines use spark ignition, while diesel engines use compression ignition.

• Petrol engines use a spark plug to ignite the fuel-air mixture, while diesel engines rely on compression to ignite the fuel.

• Petrol engines are lighter and more responsive, while diesel engines are more fuel efficient and have higher torque.

• Petrol engines are more common in cars and motorcycles, while diesel engines are often used in trucks, buses, and heavy machinery.

Pass can be supplied from one point to another point through various means such as pipes, conveyors, or cables.

• Pipes can be used to supply liquids or gases from one point to another.

• Conveyors can be used to transport solid materials from one point to another.

• Cables can be used to transmit electrical signals or power from one point to another.

• The choice of method depends on the nature of the material being transported and the distance between the two points.

Rediyeato is not a known term in mechanical engineering.

If there is a defect in the product, it is important to identify the root cause, rectify the issue, and implement preventive measures.

• Identify the root cause of the defect through thorough analysis

• Rectify the issue by repairing or replacing the defective part

• Implement preventive measures to avoid similar defects in the future

• Conduct quality checks at various stages of production to ensure defect-free products

• Engage in continuous improvement processes to enhance product qualit...read more

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

• Stress is a measure of the internal forces within a material, while strain is the measure of the deformation or change in shape of the material.

• Stress is typically measured in units of force per unit area (such as N/m^2 or Pa), while strain is a dimensionless quantity.

• Stress can be tensile (pulling apart) or compressive (pushing together), while strain can be elastic (rever...read more

A mechanical machine is a device that uses mechanical power to perform a specific task.

• Mechanical machines are used in various industries such as manufacturing, construction, and transportation.

• Examples of mechanical machines include engines, pumps, turbines, and conveyor belts.

• These machines convert mechanical energy into useful work, such as generating electricity or moving objects.

• Mechanical machines require maintenance and repair to ensure they operate efficiently and saf...read more

The type of extruder oil pump depends on the specific requirements of the extruder machine.

• The pump should be able to handle the viscosity and temperature of the oil being used.

• The pump should be able to provide a consistent flow rate.

• Common types of pumps used in extruder machines include gear pumps, screw pumps, and piston pumps.

• The choice of pump also depends on the size and capacity of the extruder machine.

Hydraulic system is a technology that uses fluid to transmit power and control movement.

• Hydraulic system uses a fluid, usually oil, to transmit power.

• It consists of a pump, valves, actuators, and fluid reservoir.

• The pump pressurizes the fluid, which is then controlled by valves to move actuators.

• Actuators can be cylinders or motors that convert fluid pressure into mechanical force or motion.

• Hydraulic systems are used in various applications like heavy machinery, automotive br...read more

Metallic gaskets are used in various industries for high-pressure and high-temperature applications.

• Spiral wound gasket: made of alternating layers of metal and filler material

• Ring joint gasket: used in high-pressure applications, has a metallic ring

• Metal jacketed gasket: consists of a soft filler material enclosed in a metal jacket

• Kammprofile gasket: has a serrated metal core with a soft sealing material

• Corrugated metal gasket: made of thin metal with corrugations for flexib...read more

ISO stands for International Organization for Standardization.

• ISO is an independent, non-governmental international organization that develops and publishes standards.

• It was founded in 1947 and is headquartered in Geneva, Switzerland.

• ISO standards ensure that products, services, and systems are safe, reliable, and of good quality.

• Some examples of ISO standards include ISO 9001 for quality management systems, ISO 14001 for environmental management systems, and ISO 27001 for in...read more

No, there is no specific code for Ms pipeline.

• There is no specific code designated for Ms pipeline in the mechanical engineering field.

• Ms pipeline may refer to a type of pipeline material or construction method, but it does not have a standardized code.

• Engineers typically follow industry standards and specifications when designing and constructing pipelines.

Active Directory is a Microsoft service that manages network resources and user accounts.

• Active Directory is used to authenticate and authorize users and computers in a network.

• It allows administrators to manage and control access to network resources.

• Active Directory stores information about users, groups, computers, and other network objects.

• It provides a hierarchical structure for organizing network resources.

• Active Directory is commonly used in enterprise environments.

• Exa...read more

I'm sorry, I don't have access to the current number of CNC machines in Sona plant.

• I don't have access to the current data on the number of CNC machines in Sona plant.

• It would be best to contact Sona plant directly for an accurate answer.

• The number of CNC machines in Sona plant may vary depending on various factors such as production needs and upgrades.

Work planning is essential for organizing tasks, setting priorities, and ensuring efficiency.

• Without work planning, tasks may be disorganized and priorities may not be clear.

• Efficiency may decrease as time may be wasted on unnecessary tasks or tasks may be completed out of order.

• Work planning helps in setting goals, allocating resources effectively, and tracking progress.

• For example, in a manufacturing plant, without work planning, production schedules may be disrupted and le...read more

In the absence of a work process seat, alternative seating arrangements or standing workstations can be considered.

• Consider using alternative seating arrangements such as stools or standing desks.

• Implement ergonomic principles to ensure comfort and efficiency for workers.

• Provide adjustable seating options to accommodate different preferences and needs.

• Encourage regular breaks and movement to prevent fatigue and discomfort.

• Consult with occupational health and safety experts fo...read more

Gearbox is a mechanical device that transmits power from an engine to the wheels.

• It is used to change the speed and torque of a vehicle.

• It contains gears of different sizes that mesh with each other to transmit power.

• It can be manual or automatic depending on the type of vehicle.

• Examples include a manual transmission in a car or a gearbox in a wind turbine.

The default protocol used in directory services is LDAP.

• LDAP stands for Lightweight Directory Access Protocol.

• It is used to access and manage directory information.

• LDAP is commonly used in enterprise environments for authentication and authorization.

• Examples of directory services that use LDAP include Microsoft Active Directory and OpenLDAP.

Tolerance refers to the allowable variation in a dimension or specification.

• Tolerance is the range within which a dimension or specification can deviate without affecting the functionality or performance of a product.

• It is used to ensure proper fit, clearance, and functionality of mechanical parts.

• Tolerance is specified in terms of upper and lower limits or as a range of acceptable values.

• For example, if a hole is specified to have a diameter of 10 mm with a tolerance of ±0.1...read more

Centrifugal pumps are dynamic pumps that use a rotating impeller to increase the pressure and flow rate of a fluid.

• Centrifugal pumps are commonly used in industrial, commercial, and residential applications.

• Types of centrifugal pumps include end suction pumps, inline pumps, multistage pumps, and self-priming pumps.

• Each type of centrifugal pump has specific advantages and applications based on the fluid being pumped and the system requirements.

Pneumatics is used for its simplicity, reliability, and cost-effectiveness in various applications.

• Pneumatic systems are easy to install and maintain.

• They are reliable and have a long lifespan.

• Pneumatics are cost-effective compared to other systems.

• They are used in various applications such as manufacturing, transportation, and construction.

• Examples include pneumatic drills, air compressors, and pneumatic cylinders.

A chain is a series of connected links or rings typically used for transmitting motion or power.

• A chain is made up of individual links or rings that are connected together.

• Chains are commonly used in machinery and vehicles to transmit motion or power.

• Examples of chains include bicycle chains, conveyor chains, and roller chains.

• Chains can be made of various materials such as steel, stainless steel, or plastic.

• They are often used in applications where flexibility, strength, and...read more

Equipment alignment involves ensuring that all components of a machine are properly positioned and oriented to work efficiently and accurately.

• Ensuring that all parts of the equipment are correctly positioned relative to each other

• Checking and adjusting the alignment of shafts, belts, gears, and other components

• Using precision tools such as laser alignment systems to achieve accurate alignment

• Proper alignment helps prevent premature wear and damage to equipment

• Examples: Align...read more

Coupling is a device used to connect two shafts together at their ends for transmitting power.

• Couplings are used to transmit power from one shaft to another shaft.

• They are used to compensate for misalignment between shafts.

• Types of couplings include rigid couplings, flexible couplings, fluid couplings, and magnetic couplings.

• Examples of couplings include gear couplings, grid couplings, and jaw couplings.

Tool life refers to the duration for which a tool can perform its intended function before it becomes unusable or requires replacement.

• Tool life is the measure of how long a tool can maintain its cutting or machining performance.

• It is influenced by factors such as cutting speed, feed rate, material hardness, tool material, and cutting conditions.

• Tool life can be measured in terms of the number of parts produced, the distance or time the tool can operate before failure, or the...read more

The main types of pumps are centrifugal pumps, reciprocating pumps, and rotary pumps.

• Centrifugal pumps use centrifugal force to move fluid through a rotating impeller.

• Reciprocating pumps use a piston or plunger to create pressure and move fluid.

• Rotary pumps use rotating mechanisms to transfer fluid, such as gear pumps or vane pumps.

A diesel engine is an internal combustion engine that uses diesel fuel to power its operation.

• Diesel engines are commonly used in heavy-duty vehicles such as trucks, buses, and trains.

• They are more fuel-efficient than gasoline engines and produce less carbon dioxide emissions.

• Diesel engines work by compressing air in the cylinder and then injecting diesel fuel into the compressed air, causing combustion.

• They are known for their durability and longevity, making them a popular ...read more

A petrol engine is an internal combustion engine that uses petrol as fuel to power the vehicle.

• Petrol engine is also known as gasoline engine.

• It converts the chemical energy of petrol into mechanical energy.

• It has four strokes: intake, compression, combustion, and exhaust.

• Examples include engines used in cars, motorcycles, and small aircraft.

• It is less fuel-efficient than diesel engines but produces more power.

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

• Spur gears have straight teeth and are used to transmit motion between parallel shafts.

• Helical gears have angled teeth and provide smoother and quieter operation compared to spur gears.

• Bevel gears have cone-shaped teeth and are used to transmit motion between intersecting shafts.

• Worm gears consist of a worm and a worm wheel and are used for high reduction ratios and self-locki...read more

The question seems to be asking about the least count of a micrometer.

• The least count of a micrometer is the smallest measurement that can be read or measured using the device.

• It is typically determined by the number of divisions on the thimble and the pitch of the screw.

• For example, if a micrometer has 50 divisions on the thimble and a pitch of 0.5 mm, the least count would be 0.01 mm.

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

• The least count of a vernier caliper is typically 0.02 mm or 0.001 inches.

• It is determined by the number of divisions on the main scale and the vernier scale.

• For example, if the main scale has 20 divisions and the vernier scale has 10 divisions, the least count would be 0.02 mm.

As a Diploma Mechanical Engineer, my job involves designing, testing and maintaining mechanical systems and equipment.

• Designing mechanical systems and components

• Testing and evaluating prototypes

• Maintaining and repairing mechanical equipment

• Collaborating with other engineers and technicians

• Ensuring compliance with safety and quality standards

Hand tools are tools that are powered by hand rather than by electricity or motor.

• Types of hand tools include wrenches, pliers, screwdrivers, hammers, chisels, saws, and files.

• Hand tools are used for various purposes such as tightening or loosening bolts, cutting, shaping, and smoothing materials.

• Some hand tools have specialized functions such as pipe wrenches, wire strippers, and torque wrenches.

• Hand tools can be made of different materials such as steel, aluminum, and plast...read more

Gaskeet is a misspelling of gasket, which is a mechanical seal that fills the space between two or more mating surfaces. Tepnartep is not a known term.

• A gasket is used to prevent leakage between two surfaces, such as in an engine or piping system

• Gaskets can be made from a variety of materials, including rubber, silicone, metal, and paper

• Tepnartep is not a known term and may have been a misspelling or mispronunciation of another word

Strain is the deformation of a material under load, while stress is the force applied to a material per unit area.

• Strain is a measure of how much a material deforms under stress.

• Stress is the force applied to a material per unit area.

• Strain is a dimensionless quantity, while stress is measured in units of force per unit area (such as N/m^2 or Pa).

• Strain can be either tensile (stretching) or compressive (squeezing), while stress can be tensile, compressive, or shear.

• Example: W...read more

1s, 2s, 3s refer to the electron shells in an atom.

• 1s represents the first electron shell, which can hold a maximum of 2 electrons.

• 2s represents the second electron shell, which can also hold a maximum of 2 electrons.

• 3s represents the third electron shell, which can hold a maximum of 2 electrons as well.

• These electron shells are part of the electron configuration of an atom, determining its chemical properties.

I'm sorry, but the question is not clear and seems to be incomplete.

The 50mt structure gallery can be erected using cranes, scaffolding, and skilled labor.

• Use cranes to lift and place heavy components of the structure.

• Set up scaffolding for workers to access different levels of the structure.

• Ensure skilled laborers follow safety protocols and construction plans.

• Use appropriate tools and equipment for assembly and welding.

• Inspect the structure regularly for quality control and safety measures.

Mechanical machines are devices that use mechanical power to perform work, such as moving, lifting, cutting, or shaping materials.

• Mechanical machines convert mechanical energy into useful work

• They are used in various industries such as manufacturing, construction, and transportation

• Examples include engines, pumps, conveyor belts, and cranes

A micrometre is a unit of length equal to one millionth of a meter, commonly used for measuring very small distances.

• A micrometre is also known as a micron.

• It is commonly used in fields such as engineering, physics, and biology for measuring small distances.

• One micrometre is equal to 0.001 millimeters or 0.000001 meters.

• Examples of objects measured in micrometres include bacteria, cells, and thin films.

• Micrometres are often used in precision machining and manufacturing proces...read more

A pump is a mechanical device used to move fluids by applying mechanical force.

• Pumps are used in various industries such as oil and gas, water treatment, and manufacturing.

• They can be classified into different types based on their working principles, such as centrifugal pumps and positive displacement pumps.

• Pumps are used to increase the pressure or flow rate of fluids, enabling them to be transported over long distances.

• They can be powered by electricity, engines, or even ma...read more

A pump is a mechanical device used to move fluids from one place to another.

• Pumps are used in various industries such as water treatment, oil and gas, and chemical processing.

• They can be classified into two types: positive displacement pumps and centrifugal pumps.

• Examples of pumps include water pumps, fuel pumps, and vacuum pumps.

• Pumps can be powered by electricity, diesel engines, or even human power.

• Pumps are essential in many applications where fluids need to be transporte...read more

Young's Modulus is a material property that measures the stiffness of a material.

• Young's Modulus is also known as the modulus of elasticity.

• It is defined as the ratio of stress to strain within the elastic limit of a material.

• It is measured in units of pressure, such as pascals or pounds per square inch.

• Materials with high Young's Modulus values are stiffer and more difficult to deform than materials with low values.

• For example, steel has a high Young's Modulus value, while r...read more

Fuel injection is a system that delivers fuel into an internal combustion engine in a controlled manner.

• Fuel injection replaces carburetors in modern engines.

• It improves fuel efficiency, power output, and emissions.

• There are different types of fuel injection systems, such as direct injection and port injection.

• Fuel injectors spray fuel into the combustion chamber or intake manifold.

• The amount of fuel injected is controlled by the engine's electronic control unit (ECU).