Indian Institute of Astrophysics Interview Questions and Answers

The stress-strain diagram shows the relationship between stress and strain in a material.

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

• Strain is the deformation or change in shape of a material due to stress.

• The diagram plots stress on the y-axis and strain on the x-axis.

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

• The point of failure is the ultimate strength of the material.

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Invar 36 is a nickel-iron alloy known for its low coefficient of thermal expansion.

• Invar 36 is used in precision instruments, such as clocks, watches, and measuring devices.

• It is also used in aerospace industry for components that require dimensional stability at extreme temperatures.

• Invar 36 has a very low thermal expansion coefficient, making it ideal for applications where dimensional stability is critical.

• It is als...read more

An actuator motor is used to convert electrical energy into mechanical energy to produce motion or force.

• Actuator motors are commonly used in various applications such as robotics, aerospace, automotive, and industrial automation.

• They can be used to control valves, switches, and other mechanical components.

• Examples of actuator motors include stepper motors, servo motors, and linear actuators.

• They are essential componen...read more