ACF Classic Cooking Techniques 3 — Questions and Answers
Question 1: What happens chemically when an egg white foam is heated, causing it to set permanently?
- Gelatinization
- Coagulation (Correct answer)
- Emulsification
- Caramelization
Correct answer: Coagulation
Heat causes egg white proteins (primarily ovalbumin) to denature and coagulate, forming a permanent solid foam structure.
Question 2: In the classical brigade system, which cook is responsible for all sautéed items and their sauces?
- Garde manger
- Poissonnier
- Saucier (Correct answer)
- Rôtisseur
Correct answer: Saucier
The saucier (sauté cook) is considered one of the most skilled positions, responsible for sautéed dishes and most hot sauces.
Question 3: Which fat has the highest smoke point and is most suitable for high-heat sautéing?
- Extra-virgin olive oil
- Whole butter
- Clarified butter (ghee) (Correct answer)
- Unrefined coconut oil
Correct answer: Clarified butter (ghee)
Clarified butter has milk solids removed, raising its smoke point to approximately 450°F (232°C) compared to whole butter's ~300°F.
Question 4: What is the correct method for 'turning' vegetables in classical French cuisine?
- Rotating vegetables in boiling water to ensure even cooking
- Carving vegetables into uniform barrel or football shapes with seven sides (Correct answer)
- Slicing vegetables on a mandoline into thin rounds
- Blanching vegetables in salted water then shocking in ice water
Correct answer: Carving vegetables into uniform barrel or football shapes with seven sides
Turning (tourner) is a classical knife technique producing a seven-sided football shape for uniform cooking and elegant presentation.
Question 5: When deglazing a pan, what is the correct sequence?
- Add liquid, scrape fond, reduce (Correct answer)
- Remove excess fat, add cold liquid, scrape fond, reduce
- Add hot liquid over high heat immediately after searing
- Cool the pan first, then add liquid to preserve fond
Correct answer: Add liquid, scrape fond, reduce
Deglazing involves adding liquid to a hot pan and scraping up the fond, then reducing to concentrate flavors into a sauce.
Question 6: Which method correctly describes 'à la nage' cooking?
- Cooking shellfish in a flavored, aromatic court-bouillon and serving in the broth (Correct answer)
- Grilling seafood over an open flame with herb butter
- Poaching fish in red wine and reducing the liquid to a glaze
- Deep-frying seafood in clarified butter
Correct answer: Cooking shellfish in a flavored, aromatic court-bouillon and serving in the broth
À la nage ('swimming') means poaching shellfish in a court-bouillon and presenting it submerged in the aromatic broth.
Question 7: What is the purpose of the 'nappe' test when evaluating sauce consistency?
- To check if the sauce has reached a full boil
- To verify the sauce coats the back of a spoon and a line drawn holds clean (Correct answer)
- To measure the Brix level of a sugar syrup
- To determine if a cream sauce has curdled
Correct answer: To verify the sauce coats the back of a spoon and a line drawn holds clean
The nappe test confirms a sauce has thickened enough to coat a spoon; a clean line drawn through the coating should hold.
ACF Classic Cooking Techniques 3
What happens chemically when an egg white foam is heated, causing it to set permanently?