Understanding Viscosity Control in Culinary Applications

Which of the following is NOT a method used by chefs to control viscosity?

• Starch-based thickener

• Reduction

• Modernist thickeners

• Adding sugar

What happens to particles in a fluid when the volume fraction is low?

• They have little to no effect

• They evaporate

• They significantly increase viscosity

• They form a solid mass

At what volume fraction do particles start to significantly impact fluid flow?

• 10%

• 25%

• 50%

• 75%

How do starch granules increase the viscosity of a fluid?

• By evaporating

• By expanding and sticking together

• By dissolving completely

• By reducing the temperature

What is a characteristic of modernist thickeners?

• They are ineffective in cold temperatures

• They require large amounts to be effective

• They decrease the viscosity

• They are large molecules or polymers

What unique feature do polymers have that affects viscosity?

• They can occupy a large volume with little mass

• They evaporate quickly

• They dissolve in water

• They are rigid and inflexible

How do polymers behave in a fluid?

• They follow a random walk pattern

• They form a rigid structure

• They dissolve completely

• They evaporate

What is the process called when polymers disentangle to allow fluid flow?

• Evaporation

• Diffusion

• Reptation

• Condensation

Why are polymer thickeners compared to a bowl of spaghetti?

• They are both edible

• They both involve entanglement

• They both require heat to function

• They both dissolve in water

What is the effect of polymers occupying a large volume in a fluid?

• They make the fluid evaporate

• They increase the fluid's viscosity

• They decrease the fluid's temperature

• They solidify the fluid