20+ Interview Questions and Answers

High pressure die casting is a metal casting process in which molten metal is injected into a steel mold under high pressure.

• Molten metal is injected into a steel mold under high pressure

• The mold is designed to create complex shapes with high accuracy

• The process is used to produce parts with high strength and dimensional accuracy

• Commonly used metals include aluminum, zinc, and magnesium

• Used in automotive, aerospace, and consumer electronics industries

Types of fit include clearance fit, interference fit, transition fit, etc.

• Clearance fit: parts are intended to have a gap between them, such as a shaft and a hole

• Interference fit: parts are intended to be pressed or forced together, such as a bearing and a shaft

• Transition fit: parts have both clearance and interference, such as a piston and a cylinder

• Other types of fit include force fit, shrink fit, and sliding fit

AutoCAD is a computer-aided design software widely used in engineering for creating precise and detailed 2D and 3D drawings.

• Creating accurate and detailed technical drawings

• Designing and drafting architectural plans

• Producing engineering diagrams and schematics

• Generating 3D models for visualization and analysis

• Creating construction and manufacturing blueprints

• Simulating and testing designs before implementation

• Collaborating and sharing drawings with team members

• Automating repe...read more

CAD stands for Computer-Aided Design.

• CAD is a technology that uses computer systems to assist in the creation, modification, analysis, or optimization of a design.

• It is widely used in various industries such as architecture, engineering, and manufacturing.

• CAD software allows designers to create 2D or 3D models of products or structures.

• It helps in improving design accuracy, reducing errors, and increasing productivity.

• Examples of popular CAD software include AutoCAD, SolidWor...read more

Gravity die casting is a casting process where molten metal is poured into a permanent metal mould under the force of gravity.

• Also known as permanent mould casting

• Used for producing high-quality, consistent parts

• Moulds are typically made of steel or cast iron

• Commonly used for casting aluminum and copper alloys

Breakdown in dies on machine can be due to wear and tear, misalignment, overheating, or material defects.

• Wear and tear from continuous use can lead to cracks or breakage in the dies.

• Misalignment of the dies can cause them to wear unevenly or break prematurely.

• Overheating of the dies can weaken their structure and lead to failure during operation.

• Material defects in the dies, such as impurities or weak spots, can cause them to break under stress.

• Regular maintenance and inspect...read more

Troubleshooting quality issues involves identifying the root cause and implementing corrective actions.

• Gather information about the issue and its impact on production

• Identify the root cause using tools like fishbone diagrams or 5 whys

• Develop and implement corrective actions to address the root cause

• Monitor the effectiveness of the corrective actions and adjust as necessary

The first angle symbol is a triangle with one corner pointing upwards.

• The symbol is used in engineering drawings to indicate the orientation of a part or feature.

• It is also known as the 'European' or 'ISO' symbol.

• The symbol is drawn with a solid line for visible edges and a dashed line for hidden edges.

• Example: ▲

Copper has a high melting point compared to other common metals.

• Copper has a melting point of 1,984.32 degrees Fahrenheit (1,085 degrees Celsius).

• It is commonly used in electrical wiring, plumbing, and heat exchangers due to its high melting point.

• Other metals like aluminum (660.32°C) and iron (1,538°C) have lower melting points compared to copper.

Tungsten has the highest melting point of any element at 3,422 degrees Celsius.

• Tungsten has the highest melting point of any element

• Its melting point is 3,422 degrees Celsius

• Tungsten is commonly used in high-temperature applications such as light bulb filaments and rocket engine nozzles

A limit switch is a device that is used to detect the presence or absence of an object within a certain range of motion.

• Limit switches are commonly used in industrial applications to control machinery and equipment.

• They consist of an actuator that is mechanically linked to a set of contacts, which are opened or closed depending on the position of the actuator.

• Limit switches can be used to stop the motion of a machine when a certain position is reached, or to trigger an alarm ...read more

Yes, I am able to work in high temperatures.

• I have experience working in environments with high temperatures.

• I am physically fit and able to handle the heat.

• I am aware of the necessary precautions to take in high temperature conditions.

• I am comfortable wearing appropriate protective gear in hot conditions.

Types of cooling used in dies include water cooling, air cooling, and oil cooling.

• Water cooling: uses water to remove heat from the die

• Air cooling: uses air to cool the die

• Oil cooling: uses oil to dissipate heat from the die

Material and hrc of die parts are crucial for determining the durability and performance of the parts.

• Material selection for die parts depends on factors like strength, wear resistance, and thermal conductivity.

• Common materials used for die parts include tool steels like H13, D2, and A2.

• Hardness of die parts is typically measured using Rockwell Hardness Scale (HRC).

• Higher HRC values indicate greater hardness and wear resistance.

• Proper heat treatment is essential to achieve th...read more

Types of fit refer to the degree of tightness or looseness between two mating parts.

• Clearance fit: parts are intended to have a gap between them

• Interference fit: parts are intended to be pressed or forced together

• Transition fit: parts have a combination of clearance and interference fit

• Examples include press fit, slip fit, and force fit

Tolerance refers to the allowable deviation from a specified value in engineering measurements.

• Types of tolerance include bilateral, unilateral, basic, and geometric tolerances.

• Bilateral tolerance allows for deviation in both directions from the specified value.

• Unilateral tolerance allows for deviation in only one direction from the specified value.

• Basic tolerance is the standard tolerance specified for a dimension.

• Geometric tolerances control the form, profile, orientation, ...read more

There are many types of steel, including carbon steel, alloy steel, stainless steel, and tool steel.

• Carbon steel is the most common type and is used in construction and manufacturing.

• Alloy steel contains additional elements like nickel or chromium to improve strength and durability.

• Stainless steel is corrosion-resistant and often used in kitchen appliances and medical equipment.

• Tool steel is used for making tools and dies, and is known for its hardness and resistance to abras...read more

M6 drill size refers to the diameter of the drill bit used for making holes with a metric thread size of 6mm.

• M6 drill size is commonly used in manufacturing and engineering industries.

• The diameter of the drill bit for M6 size is approximately 5.2mm.

• M6 drill size is used for creating holes in materials such as metal, plastic, and wood.

• It is important to use the correct drill size to ensure the hole is the correct size and the thread fits properly.

There are many types of steel, each with different properties and uses.

• Carbon steel: contains varying amounts of carbon, used in construction and manufacturing

• Alloy steel: contains additional elements like nickel or chromium for improved strength and durability

• Stainless steel: contains chromium for corrosion resistance, commonly used in kitchen appliances and medical instruments

• Tool steel: designed for making tools, with high hardness and wear resistance

Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity.

• Metal is melted and forced into a mold cavity under high pressure

• The mold cavity is created using two hardened tool steel dies

• Commonly used for producing high volume, high precision metal parts

Tolerance refers to the acceptable range of variation in a process or product without affecting its quality.

• Tolerance is the maximum allowable deviation from a specified dimension or value.

• It ensures that products meet quality standards even with minor variations.

• For example, in manufacturing, a part may have a tolerance of +/- 0.1mm for its dimensions.

• Tolerance can also refer to the ability to withstand or endure something, such as heat or stress.

Tolerance refers to the acceptable range of variation in a measurement or dimension.

• Tolerance is the maximum allowable difference between the actual measurement and the desired measurement.

• It is important in manufacturing to ensure that parts fit together properly.

• For example, if a hole is supposed to be 1 inch in diameter with a tolerance of +/- 0.005 inches, the actual hole diameter can range from 0.995 inches to 1.005 inches.