技術大解密：地鐵標誌及美國軍隊披薩野戰口糧 Tech Revealed Subway Sign and MRE Pizza 解答

What is the key challenge in stabilizing pizza for a long period of time?

• Preventing water leaching between components
• Maintaining consistent taste and texture
• Finding suitable ingredients for the dough
• Minimizing the use of preservatives

What is the purpose of the oxygen absorbing sachet in the pizza MRE packaging?

• To enhance the flavor of the pizza
• To make the pizza last longer
• To absorb excess moisture
• To prevent the growth of bacteria

What was the main disadvantage of using canned food for soldiers’ rations?

• It required refrigeration
• It was too expensive
• It took up valuable space
• It had a short shelf life

Where is the London Underground’s roundel sign manufactured?

• London
• Paris
• Isle of Wight
• Farrington

What ingredient is added to the pizza sauce to prevent it from seeping into the dough?

• Sugar
• Salt
• Tomato paste
• Humectants

What surprising ingredient is added to the enamel mixture to prevent cracking during firing?

• Clay
• Quartz
• Urea
• Glass

What was invented in 1976 as an alternative to canned food?

• Flexible packaging
• Freeze-dried food
• Vacuum-sealed containers
• Portable refrigerators

What material is the roundel sign made of?

• Steel
• Plastic
• Enamel
• Glass

What is the final step in the manufacturing process of the roundel sign?

• Applying enamel ink
• Baking in the furnace
• Screwing the sections together
• Cutting the steel back plate

What is the purpose of the MRE?

• To serve as a lightweight alternative to canned food for soldiers during battles.
• To offer people a variety of food choices, including pizza, during deployments.
• To supply soldiers with a low-calorie meal that can last up to 1,000 days.
• To provide a quick and convenient meal option for soldiers at home.

Which technique is used to apply colors to the roundel sign?

• Silk screen printing
• Spray painting
• Hand-painting
• Engraving

How do scientists simulate three years of changing climates in a shorter time?

• By using special ovens
• By storing the pizza slices in refrigerators
• By condensing the changes into six months
• By exposing the pizza slices to extreme temperatures

What is the main challenge in stabilizing pizza for a long period of time?

• Ensuring the dough is super tender.
• Preventing the sauce from having too much acidity.
• Interacting with different components of the pizza.
• Finding a suitable container for the pizza.

To make it into a long-lasting tube sign, a strong steel backplate is cut into a roundel shape, __________ a computer-controlled cutting machine.

• a
• with
• of
• to

What is the main purpose of the London Underground’s roundel sign?

• To symbolize Britain’s capital city
• To provide directions to tourists
• To withstand London’s rush hour
• To decorate the tube stations

What is the temperature at which the signs are baked in the furnace?

• degrees Celsius
• degrees Celsius
• degrees Celsius
• degrees Celsius

What is the purpose of silk screen printing in the sign-making process?

• To add colors to the sign
• To apply enamel paste to the steel
• To cut the steel back plate into a roundel shape
• To fuse the enamel ink to the sign

How are the signs coated with enamel applied to the steel back plate?

• Brushed on with a brush
• Slop onto the bare steel
• Sprayed on with an air gun
• Dipped in enamel mixture

What feedback did soldiers give after tasting the pizza MRE?

• It tasted fresh out of the oven
• It was too sweet and acidic
• The cheese was not good
• The crust was too hard

What is the shelf life requirement for MREs?

• year without refrigerating
• years without refrigerating
• years without refrigerating
• years without refrigerating

What material is used to make the screens for silk screen printing?

• Silk
• Nylon
• Pine oil
• Clay