10+ Century Enka Interview Questions and Answers

Stress is the force per unit area. Engineering stress-strain curve is based on original dimensions while true stress-strain curve is based on instantaneous dimensions. Moment is the force that causes rotation while torque is the measure of the force's ability to cause rotation.

• Stress is the force per unit area that a material experiences when subjected to an external force.

• Engineering stress-strain curve is based on the original dimensions of the material while true stress-st...read more

Aluminium bar has higher deformation in axial and bending, while steel bar has higher deformation in torsion.

• Aluminium has lower Young's modulus than steel, making it more deformable in axial and bending loads.

• Steel has higher shear modulus than aluminium, making it more resistant to torsion.

• The difference in deformation between the two materials can be quantified using finite element analysis.

• For example, a prismatic aluminium bar may deform 2mm under a 1000N axial load, whi...read more

Transmissibility is the ratio of the amplitude of vibration of a system with a force applied to it to the amplitude of the force applied.

• It is a measure of how much a system amplifies or attenuates vibrations.

• It is expressed as a ratio or a percentage.

• Transmissibility depends on the frequency of the force and the natural frequency of the system.

• A system with a low natural frequency will have a high transmissibility at low frequencies.

• A system with a high natural frequency wil...read more

Natural frequency is the frequency at which a system oscillates when disturbed from its equilibrium position.

• It is the frequency at which a system vibrates without any external force applied.

• It is determined by the stiffness and mass of the system.

• It is an important factor in designing structures to avoid resonance.

• Examples include the natural frequency of a guitar string or a suspension bridge.

The factor of wire selection is determined by the current carrying capacity, voltage rating, insulation material, and environmental conditions.

• Current carrying capacity: Ensure the wire can handle the maximum current without overheating.

• Voltage rating: Select a wire with a voltage rating higher than the system voltage.

• Insulation material: Choose the appropriate insulation material based on temperature and environmental factors.

• Environmental conditions: Consider factors like m...read more

CT and PT are electrical devices used for measuring current and voltage in power systems.

• CT stands for Current Transformer and is used to measure high currents by stepping down the current to a lower value.

• PT stands for Potential Transformer and is used to measure high voltages by stepping down the voltage to a lower value.

• CTs and PTs are commonly used in power distribution systems to provide accurate measurements for protection and control purposes.

Selection of circuit breaker type depends on various factors such as voltage, current rating, breaking capacity, and application.

• Consider the voltage level - low voltage, medium voltage, high voltage

• Determine the current rating - thermal and magnetic settings

• Evaluate the breaking capacity - short circuit withstand capability

• Analyze the application - industrial, commercial, residential

• Types of circuit breakers include MCB, MCCB, ACB, VCB, GCB, etc.

Continuous training and knowledge enhancement are essential for staying updated with industry standards and advancements.

• Regularly attend workshops, seminars, and conferences related to your field

• Pursue certifications or advanced degrees to deepen your expertise

• Stay updated with industry trends through reading journals, articles, and online resources

• Participate in internal training programs offered by the company

• Seek mentorship from experienced professionals in the field

CT burdens refer to the impedance or resistance that a current transformer (CT) presents to the secondary circuit.

• CT burdens are typically expressed in ohms and represent the load that the CT must drive.

• The burden impedance can affect the accuracy of the CT's output signal.

• Common CT burdens include resistors, relays, meters, and other devices connected to the CT's secondary circuit.

• It is important to match the CT burden with the CT's rating to ensure accurate measurements.

Types of welds include fillet welds, groove welds, plug welds, and spot welds.

• Fillet welds are used to join two surfaces at right angles.

• Groove welds are used to join two metal edges together.

• Plug welds are used to fill a hole in one of the pieces being joined.

• Spot welds are made by overlapping two metal sheets and applying pressure and heat to create a weld.

Types of FEA analysis include linear static, nonlinear static, dynamic, thermal, and modal analysis.

• Linear static analysis: evaluates the response of a structure under a static load.

• Nonlinear static analysis: considers material nonlinearity, large deformations, and contact.

• Dynamic analysis: studies the behavior of a structure under dynamic loads or vibrations.

• Thermal analysis: assesses the temperature distribution and its effects on the structure.

• Modal analysis: identifies th...read more

Geometric dimensions and tolerance are crucial in design engineering to ensure accurate and consistent manufacturing.

• Geometric dimensions refer to the physical measurements and characteristics of a part or component.

• Tolerances specify the allowable variations in dimensions to ensure proper fit and function.

• GD&T (Geometric Dimensioning and Tolerancing) is a system used to define and communicate engineering tolerances.

• Examples of GD&T symbols include concentricity, perpendicula...read more