CPM Oven Calibration & Baking Science 3

Question 1

A convection oven is used in place of a conventional oven. By how much should the recipe temperature typically be reduced?

Accepted Answer

25°F

Answer

Convection ovens circulate hot air more efficiently and typically require reducing the temperature by 25°F compared to conventional ovens.

Question 2

What is the primary purpose of chilling pie dough before rolling and baking?

Accepted Answer

To relax gluten and firm the fat for flakier layers

Answer

Chilling allows gluten to relax (reducing shrinkage) and keeps fat solid so it creates distinct flaky layers during baking.

Question 3

Which oven rack position is generally best for baking a fruit pie to ensure the bottom crust cooks through?

Accepted Answer

Lower-third rack

Answer

Placing the pie on the lower-third rack brings it closer to the heat source, helping the bottom crust cook fully before the top over-browns.

Question 4

Why does a custard-based pie (such as pumpkin) crack on top after baking?

Accepted Answer

The pie was overbaked, causing proteins to over-contract

Answer

Overbaking causes egg proteins in the custard to over-coagulate and contract, creating cracks on the surface.

Question 5

What is the function of an egg wash applied to the top crust of a pie before baking?

Accepted Answer

To promote browning via the Maillard reaction and add sheen

Answer

Egg wash provides proteins and sugars that undergo the Maillard reaction when heated, producing a golden, glossy finish.

(CPM) Certified Pie Maker Practice Test