20+ Post Graduate Engineer Trainee Interview Questions and Answers

Questions on beam deflection and yield point in engineering interview.

• Max deflection of a beam with fixed support on one end and flexible support on the other end is calculated using the formula: (5WL^4)/(384EI)

• Yield point is the point at which a material starts to deform plastically instead of elastically under stress.

• Lower yield point is considered for design because it ensures that the material will not undergo plastic deformation during normal use, which could lead to fai...read more

Answers to questions related to engineering concepts.

• Hydrostatic condition refers to the state of fluid at rest under the influence of gravity.

• True stress is calculated based on the actual cross-sectional area of the material, while engineering stress is calculated based on the original cross-sectional area of the material.

• Increasing the width of a beam while decreasing its height can increase its stability without changing its volume.

• Another way to increase the stability of ...read more

The yield strength of 8mm dia steel of 550 grade can be found using standard testing methods.

• Yield strength is the maximum stress a material can withstand without permanent deformation

• Standard testing methods like tensile testing can be used to determine the yield strength

• The 550 grade refers to the minimum yield strength of the steel

• Consulting the material's specification or conducting tests can provide the exact yield strength

Importance of time management in professional life

• Time management helps in achieving goals and meeting deadlines

• It reduces stress and increases productivity

• Prioritizing tasks and avoiding procrastination is key

• Effective time management leads to better work-life balance

• Examples: scheduling meetings, setting reminders, delegating tasks

Experimental analysis of vibration problems involves measuring and analyzing the vibration signals.

• Measure the vibration signals using accelerometers or other sensors

• Analyze the signals using signal processing techniques such as FFT, time-domain analysis, and modal analysis

• Identify the root cause of the vibration problem based on the analysis results

• Take corrective actions to eliminate or reduce the vibration problem

• Repeat the measurement and analysis process to verify the ef...read more

Detonation is an abnormal combustion process that occurs in the engine cylinder.

• It happens when the air-fuel mixture in the cylinder explodes instead of burning smoothly.

• It can cause engine damage and reduce efficiency.

• It is more common in high-performance engines and can be prevented by using high-octane fuel.

• In diesel engines, it is also known as 'diesel knock' and occurs when the fuel ignites before it should due to high pressure and temperature.

• Detonation can be heard as ...read more

The design mix ratios of concrete mixes vary depending on the specific requirements and applications.

• Design mix ratios are determined based on factors such as strength, workability, durability, and environmental conditions.

• Common design mix ratios include 1:2:4 (cement:sand:aggregate) for general construction, 1:1.5:3 for reinforced concrete, and 1:0.5:1 for high-strength concrete.

• Different types of concrete mixes, such as lean concrete, self-compacting concrete, and lightwei...read more

Different kinds of CNC milling include vertical milling, horizontal milling, and 5-axis milling.

• Vertical milling: Spindle is vertical and workpiece is mounted on top of the table.

• Horizontal milling: Spindle is horizontal and workpiece is mounted on the side of the table.

• 5-axis milling: Allows for cutting on multiple axes simultaneously, increasing precision and complexity.

• Other types include gantry milling, high-speed milling, and specialty milling processes.

The material used for piston is typically aluminum alloy or cast iron.

• Aluminum alloy is lightweight and has good thermal conductivity, making it suitable for high-performance engines.

• Cast iron is heavier but more durable and can withstand high temperatures and pressures.

• Other materials like steel, titanium, and ceramic are also used in specialized applications.

• The choice of material depends on factors like engine type, operating conditions, and cost.

Designing an industrial roof shed involves considering factors such as the type of industry, location, weather conditions, and materials.

• Determine the type of industry and its requirements

• Consider the location and weather conditions

• Choose appropriate materials for the roof and support structure

• Ensure proper ventilation and lighting

• Design for safety and accessibility

• Consider future expansion or modifications

Shear force and bending moment diagrams are graphical representations of the internal forces and moments in a structural element.

• Shear force diagram shows the variation of shear force along the length of the element.

• Bending moment diagram shows the variation of bending moment along the length of the element.

• Shear force and bending moment diagrams are commonly used in structural analysis and design.

• These diagrams help engineers understand the internal forces and moments acting...read more

Stress strain curves show the relationship between stress and strain in a material under tension.

• Stress strain curves typically have three main regions: elastic deformation, plastic deformation, and necking.

• The elastic region shows linear relationship between stress and strain, where the material returns to its original shape once the stress is removed.

• The plastic region shows non-linear relationship between stress and strain, where permanent deformation occurs.

• Necking is the...read more

Composites are materials made by combining two or more different materials to create a new material with improved properties.

• Composites are made by combining a matrix material (such as resin) with a reinforcement material (such as fibers)

• The resulting material has improved properties such as strength, stiffness, and durability

• Examples of composites include carbon fiber reinforced polymer (CFRP), fiberglass reinforced plastic (FRP), and wood-plastic composites (WPC)

• Composites ...read more

Bolt connection design involves selecting appropriate bolt size, material, and tightening torque to ensure proper joint behavior.

• Consider factors like load, environment, and material compatibility when designing bolt connections.

• Properly calculate bolt size and length to ensure sufficient strength and prevent failure.

• Select appropriate bolt material based on factors like corrosion resistance and strength requirements.

• Use proper tightening torque to achieve desired clamping fo...read more

Designing a highway involves several steps to ensure safety and efficiency.

• Determine the purpose and function of the highway

• Conduct a feasibility study and environmental impact assessment

• Select a route and acquire necessary land

• Design the road alignment, cross-section, and pavement

• Consider safety features such as signage, lighting, and barriers

• Plan for drainage and erosion control

• Estimate construction costs and develop a budget

• Obtain necessary permits and approvals

• Construct t...read more

Utilized concepts like machine learning, data analysis, and software development in various projects.

• Implemented machine learning algorithms for predictive maintenance in manufacturing industry

• Utilized data analysis techniques to optimize supply chain operations

• Developed software applications for automation of manual processes

I am a recent graduate with a degree in engineering, passionate about problem-solving and eager to learn and grow in the field.

• Recent graduate with a degree in engineering

• Passionate about problem-solving

• Eager to learn and grow in the field

Code to find the square of a given number.

• Declare a variable to store the number

• Multiply the number by itself to get the square

• Return the square value