Hitachi Energy R&D Engineer Interview Questions and Answers

Passion for developing sustainable energy solutions and improving grid reliability.

• Desire to address climate change by promoting renewable energy sources

• Interest in optimizing power distribution systems for efficiency

• Drive to enhance grid stability and reliability through innovative solutions

The process of mechanical components manufacturing involves designing, prototyping, testing, and mass production.

• Designing the component using CAD software

• Creating a prototype to test functionality and durability

• Conducting tests to ensure quality and performance standards are met

• Setting up mass production processes for efficient manufacturing

• Implementing quality control measures to maintain consistency

Various design equations are used for calculations in engineering.

• Design equations are used to calculate parameters like stress, strain, deflection, etc.

• Examples include Euler's buckling formula, Young's modulus equation, beam bending equations.

• Equations are derived from fundamental principles of physics and mechanics.

• Design equations are essential for ensuring structural integrity and performance of engineering s...read more

Iron-Carbon diagram is a graphical representation of the phases present in steel at different temperatures and carbon concentrations.

• Shows the relationship between temperature, carbon content, and phases in steel

• Consists of regions like austenite, ferrite, cementite, and pearlite

• Helps in understanding the microstructure and properties of steel

• Used in heat treatment processes to achieve desired properties

Shaft design of a motor involves selecting appropriate materials, dimensions, and manufacturing processes to ensure optimal performance and durability.

• Consider the torque and speed requirements of the motor to determine the appropriate shaft diameter and material

• Select materials with high strength and fatigue resistance, such as stainless steel or carbon steel

• Consider factors like keyways, threads, and bearing sur...read more

Stress strain diagram shows the relationship between stress and strain in a material under load.

• It is a graphical representation of how a material deforms under stress.

• The slope of the curve indicates the material's stiffness or Young's modulus.

• The area under the curve represents the material's toughness.

• Different materials have different stress-strain curves.

• It helps engineers understand a material's behavior und...read more