What distinguishes a convection oven from a standard oven?

• A. Face the heat source from the bottom only
• B. Has a built-in fan and exhaust system to circulate hot air
• C. Uses microwaves to cook food
• D. Is a purely radiant oven with no air movement

Answer: (B)

Convection ovens stand out because they have a built-in fan and exhaust system that circulates hot air around the food. That moving air transfers heat more efficiently, so cooking is faster and more even, with better browning on the exterior. In a standard oven, heat comes from radiant elements and relies on natural air movement, which can create uneven spots and longer cooking times. The other descriptions describe different heating methods (one implies heat only from the bottom, another uses microwaves, and a radiant oven has no active air movement). The defining feature here is the fan and exhaust that actively move hot air.