SR ASHOK AND ASSOCIATES Interview Questions and Answers

The software used to extract data from the battery is Battery Management System (BMS).

• Battery Management System (BMS) is commonly used to extract data from the battery.

• BMS monitors the battery's state of charge, voltage, temperature, and other parameters.

• Examples of BMS software include Tesla's Powerwall app and Victron Energy's VRM Portal.

Battery problems can include overcharging, undercharging, self-discharge, sulfation, and thermal runaway.

• Overcharging can lead to decreased battery life and potential safety hazards.

• Undercharging can result in reduced capacity and performance.

• Self-discharge occurs when a battery loses charge over time, even when not in use.

• Sulfation is the formation of lead sulfate crystals on the battery plates, reducing efficiency.

• Thermal runaway is a dangerous condition where a battery ove...read more

Cell balancing is the process of ensuring that all cells in a battery pack are charged and discharged evenly to maximize performance and lifespan.

• Cell balancing helps to prevent overcharging or overdischarging of individual cells in a battery pack.

• There are different methods of cell balancing such as passive balancing, active balancing, and hybrid balancing.

• Examples of cell balancing techniques include shunting excess energy from fully charged cells to undercharged cells, or ...read more

SoC stands for State of Charge, SoH stands for State of Health, and C-Rate is a measure of the rate at which a battery is charged or discharged.

• SoC (State of Charge) refers to the amount of energy remaining in a battery relative to its capacity.

• SoH (State of Health) refers to the overall condition and performance of a battery compared to its original specifications.

• C-Rate is a measure of the rate at which a battery is charged or discharged, expressed as a multiple of the batt...read more

Torque on a bar is directly proportional to its Young's Modulus and the angle of twist.

• The formula is T = (G * J * θ) / L

• T is the torque on the bar

• G is the shear modulus of the material

• J is the polar moment of inertia of the cross-sectional area

• θ is the angle of twist

• L is the length of the bar

• Example: A steel bar with a length of 1 meter and a Young's Modulus of 200 GPa is twisted by 0.1 radians. The torque on the bar is T = (200 * 0.0000785 * 0.1) / 1 = 0.00157 Nm

DOD,CC-CV stands for Department of Defense, Cost Control and Validation.

• DOD,CC-CV is a term used in the Department of Defense for managing costs and validating expenses.

• It involves implementing strategies to control costs and ensure that expenses are justified.

• Examples of DOD,CC-CV activities include budget analysis, cost tracking, and expense validation processes.

To draw a bending moment diagram of a uniformly loaded bar, we need to follow a few steps.

• Calculate the reactions at the supports

• Determine the equation of the bending moment curve

• Plot the bending moment diagram using the equation

• Label the diagram with values and units

• Check the diagram for accuracy