Kenya Coffee School

From Seed to Cup – Barista Skills & Specialty Coffee

Revision Questions and Answers

Part 4: Questions 61–80 (Milk Science & Café Operations)

Milk Science

61. Why is milk steamed?

Answer: Milk is steamed to heat it and create smooth, silky microfoam that enhances the texture, sweetness, and appearance of milk-based coffee drinks.

Explanation: Steaming incorporates tiny air bubbles while heating the milk, producing a creamy texture suitable for drinks such as cappuccinos and lattes.

Exam Tip: Properly steamed milk should be glossy, silky, and free of large bubbles.

62. What is the ideal milk steaming temperature?

Answer: The ideal milk temperature is 55–65°C, with 60–65°C commonly used for cow’s milk.

Explanation: Within this range, milk becomes naturally sweeter while maintaining a smooth texture.

Exam Tip: Milk heated above 70°C begins to lose sweetness and may develop a burnt taste.

63. What is microfoam?

Answer: Microfoam is finely textured milk made up of tiny, uniform bubbles.

Explanation: It has a smooth, glossy consistency and is ideal for pouring latte art.

Exam Tip: Microfoam should resemble wet paint—not soap bubbles.

64. Explain milk stretching.

Answer: Milk stretching is the process of introducing air into milk during the first few seconds of steaming.

Explanation: This increases milk volume and creates foam.

Exam Tip: Stretch only at the beginning of steaming.

65. Explain milk texturing.

Answer: Milk texturing is the process of swirling the milk during steaming to mix the foam evenly throughout the liquid.

Explanation: The steam creates a whirlpool that breaks down larger bubbles into silky microfoam.

Exam Tip: Listen for a gentle paper-tearing sound while stretching, then create a whirlpool for texturing.

66. What causes burnt milk?

Answer: Burnt milk results from:

  • Overheating above 70°C
  • Leaving the steam wand in one position
  • Steaming milk for too long

Explanation: Overheated milk loses sweetness and develops an unpleasant cooked flavour.

Exam Tip: Always use a thermometer or learn to judge temperature by touch during training.

67. Name four milk alternatives.

Answer:

  • Oat milk
  • Soy milk
  • Almond milk
  • Coconut milk

Other examples include pea milk and rice milk.

Explanation: Milk alternatives are suitable for customers with dietary preferences or lactose intolerance.

Exam Tip: Different milk alternatives foam differently.

68. Which milk proteins help create foam?

Answer: The primary proteins are:

  • Casein
  • Whey proteins

Explanation: These proteins stabilize air bubbles during steaming.

Exam Tip: Protein is responsible for foam stability, while fat contributes to creaminess.

69. Why is milk freshness important?

Answer: Fresh milk provides:

  • Better flavour
  • Better foaming
  • Improved food safety
  • Longer shelf life after opening

Explanation: Old milk foams poorly and may have an unpleasant taste.

Exam Tip: Always check expiry dates and store milk below 4°C.

70. Explain latte art fundamentals.

Answer: Latte art is created by pouring properly textured microfoam into well-extracted espresso.

Basic designs include:

  • Heart
  • Rosetta
  • Tulip

Explanation: Successful latte art requires balanced espresso, silky microfoam, and controlled pouring.

Exam Tip: Good latte art begins with excellent milk texture—not complicated pouring.

Café Operations

71. What is mise en place?

Answer: Mise en place is a French term meaning “everything in its place.”

Explanation: It involves preparing all ingredients, equipment, and workstations before service begins.

Exam Tip: Good preparation improves speed and consistency.

72. Explain FIFO in café operations.

Answer: FIFO means First In, First Out.

Explanation: Older stock is used before newer stock to reduce waste and maintain freshness.

Exam Tip: FIFO is essential for milk, coffee beans, syrups, and food products.

73. Why is hygiene important?

Answer: Hygiene:

  • Prevents food contamination
  • Protects customer health
  • Meets food safety regulations
  • Maintains café reputation

Explanation: Personal cleanliness and equipment sanitation are essential.

Exam Tip: Wash hands frequently and sanitize food-contact surfaces.

74. Name five daily opening procedures.

Answer:

  1. Wash hands and wear clean uniform.
  2. Switch on equipment.
  3. Check grinder settings.
  4. Prepare fresh milk and ingredients.
  5. Clean and organize the workstation.

Explanation: Proper opening procedures ensure smooth operations throughout the day.

Exam Tip: Never begin serving customers before checking espresso quality.

75. Name five daily closing procedures.

Answer:

  1. Backflush the espresso machine.
  2. Clean the grinder.
  3. Empty and clean the drip tray.
  4. Sanitize work surfaces.
  5. Switch off equipment safely.

Explanation: Closing procedures prolong equipment life and maintain hygiene.

Exam Tip: Cleaning is as important as coffee preparation.

76. Explain customer service excellence.

Answer: Excellent customer service includes:

  • Greeting customers warmly
  • Listening carefully
  • Being polite and respectful
  • Serving orders accurately
  • Resolving complaints professionally

Explanation: Outstanding service encourages repeat business.

Exam Tip: Customers remember how they were treated as much as they remember the coffee.

77. How should customer complaints be handled?

Answer: A barista should:

  1. Listen carefully.
  2. Stay calm.
  3. Apologize sincerely.
  4. Offer a practical solution.
  5. Thank the customer for the feedback.

Explanation: Professional complaint handling builds trust and customer loyalty.

Exam Tip: Never argue with a customer.

78. Why is teamwork important?

Answer: Teamwork:

  • Improves efficiency
  • Reduces mistakes
  • Enhances communication
  • Increases customer satisfaction
  • Creates a positive work environment

Explanation: A successful café depends on collaboration among all staff.

Exam Tip: Support your colleagues during busy periods.

79. Explain inventory management.

Answer: Inventory management is the process of monitoring, recording, storing, and replenishing café supplies.

Explanation: It helps prevent shortages, reduce waste, and control costs.

Exam Tip: Regular stock counts improve profitability.

80. Define food safety.

Answer: Food safety involves handling, preparing, and storing food and beverages in ways that prevent contamination and protect consumer health.

Explanation: It includes:

  • Personal hygiene
  • Temperature control
  • Cleaning and sanitation
  • Safe storage
  • Pest control

Exam Tip: Remember the four key principles:

  • Clean
  • Separate
  • Cook (where applicable)
  • Chill

End of Part 4

The final section, Part 5 (Questions 81–100), will cover:

  • Specialty Coffee Concepts
  • Coffee Sensory Evaluation
  • Sustainability
  • Climate-Smart Coffee
  • Traceability
  • Ethical Sourcing
  • Value Addition
  • The Professional Role of the Barista
  • The Complete “Seed to Cup” Journey