Design for Heat Transfer Practice Test

DESIGN GOAL: Reduce heat loss through a window in winter.

Heat leaves the warm room by:

• Conduction through the glass
• Convection from air leaks around the frame
• Radiation from warm indoor surfaces to the colder window

Which window upgrade best reduces heat loss by addressing conduction, convection, and radiation?

DESIGN GOAL: Keep a cold drink cold in a bottle on a hot day.

A student is deciding between two wall thicknesses of the same foam material.

Which choice better reduces heat transfer by conduction through the bottle wall?