HOW STUFF WORKS
QUIZZES

FOLLOW US
World Trade Center Slurry Wall Quiz
by Staff
The World Trade Center slurry wall survived the September 11 attacks to become an iconic reminder of a nation's loss and resolve. Test your knowledge of this unique structure with our quiz.

When was the World Trade Center slurry wall built?

  • 1967
  • 1949
  • 1976

What was the purpose of the slurry wall?

  • support for the Twin Towers
  • to keep the basement, or "bathtub," from flooding
  • decorative

Where was the slurry trench underground wall-building method developed?

  • China
  • the United States
  • Italy

When was the slurry trench method developed?

  • 1960s
  • 1970s
  • 1940s

Where was the first proposed location of the World Trade Center?

  • Harlem
  • Lower East Side
  • Midtown

What organization built the World Trade Center?

  • Port Authority
  • Chamber of Commerce
  • Rockefeller Foundation

How thick is the original World Trade Center's slurry wall?

  • 3 feet (0.9 meters)
  • 18 inches (45.7 centimeters)
  • 20 feet (6 meters)

What were the ingredients of the slurry used in the slurry trench?

  • epoxy and resin
  • sand and gravel
  • clay and water

The consistency of the slurry is usually compared to what?

  • chunky peanut butter
  • ice cream
  • buttermilk

The site of the World Trade Center was what sort of land?

  • bedrock
  • landfill
  • sand

What was the name of the neighborhood where the World Trade Center was built?

  • Hells Kitchen
  • Soho
  • Radio Row

Where did the clay used in the slurry wall come from?

  • Queens
  • Wyoming
  • Pennsylvania

What was the purpose of the slurry used in the slurry trench dug by the World Trade Center's builders?

  • decorative
  • support
  • waterproofing

How deep was the slurry trench dug?

  • 50 feet (15 meters)
  • 80 feet (24 meters)
  • 102 feet (31 meters)

After the slurry trench was finished, what was pumped into the trench?

  • paint
  • glue
  • concrete

How much was budgeted to preserve and restore the slurry wall for the September 11 museum?

  • $50,000
  • $11 million
  • $42 million

How much of the original slurry wall was included in the museum project?

  • the entire wall
  • one 50-foot (15-meter) panel
  • three 20-foot-wide (6-meter-wide) panels

What now supports the slurry wall from the interior?

  • the basement of the Twin Towers
  • steel cables
  • nothing

What was applied to the slurry wall's surface to preserve it for museum visitors?

  • plastic
  • glass
  • shotcrete

What might have been endangered had the slurry wall given way during the September 11 attacks?

  • Brooklyn Bridge
  • subway system
  • LaGuardia airport