Heat transfer: conduction, convection, and radiation

What you’ll practice

Work through conduction, convection, and radiation scenarios and learn to identify the governing mechanism from the clues in a problem. You’ll also practice interpreting temperature gradients, fluid motion, and surface properties without overcomplicating the setup.

Expect a blend of conceptual checks and calculation-ready prompts, including insulation choices, heat loss pathways, and real-world examples like cookware, HVAC, and sunlight heating.

Quiz format and difficulty

Each question has 4 options and there’s no timer, so you can think through units, assumptions, and dominant effects. Choose your preferred question count and difficulty before starting - Mixed mode intentionally alternates easier fundamentals with tougher application questions to keep progress steady.

Common pitfalls to avoid

Many mistakes come from mixing up mechanisms (for example, treating radiation like convection) or ignoring what the environment is doing. Watch for hidden cues such as still air vs moving air, shiny vs matte surfaces, and whether contact between solids actually exists.

Tips for better scores

• Start by naming the likely mode(s): conduction through solids, convection with moving fluids, radiation across space
• Check boundary conditions: contact area, insulation layers, airflow, and surface temperature
• Don’t assume “hot air rises” automatically means convection dominates - compare with conduction/radiation paths
• Keep an eye on units and proportional reasoning (e.g., what happens if ΔT doubles?)
• For radiation questions, note emissivity and surface finish; for convection, note flow speed and geometry