Targeted at engineers specializing in system-level modeling, this book gathers 400+ interview questions covering thermodynamics, fluid dynamics, control systems, and numerical methods used in 1D simulation. Each answer explains not only formulas but also practical workflow in tools such as AMESim, GT-Power, or Simulink. Candidates learn to discuss validation, parameter tuning, and model correlation confidently. With sections on cross-functional collaboration and documentation standards, it ensures you present a complete engineering profile ready for any 1D simulation interview.