A) It was stripped away by falling debris B) It melted due to extreme heat C) It was incinerated by the jet fuel D) It was removed by the airplane impacts
A) Impact-related compression B) Structural steel oxidation C) Heat-induced creep D) Excessive load vibration
A) The hat truss B) The core elevator shaft C) The floor joists D) The foundation slab
A) Exactly 6 inches B) Almost 5 feet C) More than 2 feet D) Approximately 1 foot
A) About 30 minutes longer B) Around 46 minutes longer C) Exactly 17 minutes longer D) It collapsed at the exact same time
A) In the southwestern corner B) In the northwestern corner C) Near the top mechanical floors D) More or less in the center
A) More than an hour B) Two and a half hours C) Exactly 46 minutes D) Less than 15 minutes
A) 600 miles per hour B) 500 miles per hour C) 440 miles per hour D) 350 miles per hour
A) 80 and 90 B) 77 and 85 C) 93 and 99 D) 90 and 95
A) The fire burned at a higher temperature B) The impact was lower and caused uneven weight distribution C) The building had fewer core columns D) The steel was of lower quality
A) The center of the building B) The rooftop mechanical deck C) The exact middle of the north face D) The southeastern corner
A) 93 and 99 B) 77 and 85 C) 85 and 90 D) 70 and 75
A) The building became instantly unstable B) The core columns were immediately severed C) The fireproofing remained largely attached D) More structural support remained intact
A) The mayor of New York City B) A senior FDNY chief C) The port authority director D) The lead structural engineer
A) 18 B) 147 C) 1,402 D) 614
A) 614 B) 2,606 C) 1,402 D) 342
A) 342 B) 614 C) 1,402 D) 147
A) 343 B) 18 C) 147 D) 10
A) 342 B) 147 C) 10 D) 18
A) 342 B) 147 C) 71 D) 37
A) 37 B) 342 C) 23 D) 71
A) New York City Police Department (NYPD) B) New York State Office of Tax Enforcement (OTE) C) United States Secret Service (USSS) D) Federal Bureau of Investigation (FBI)
A) 5 B) 1 C) 3 D) 23
A) 1 B) 37 C) 5 D) 3
A) 342 B) 71 C) 18 D) 10
A) Geodesic dome framework B) Reinforced concrete monolith C) Framed tube structures D) Suspension bridge design
A) Roughly 210 ft B) Exactly 200 ft C) Exactly 207 ft D) Roughly 250 ft
A) 47 B) 60 C) 35 D) 59
A) 107 B) 59 C) 210 D) 47
A) Reinforced brick B) Solid granite C) Lightweight concrete D) Pre-stressed timber
A) 10 inches B) 4 inches C) 6 inches D) 2 inches
A) Rubber bushings B) Steel bolts C) Hydraulic pistons D) Viscoelastic dampers
A) Thermal insulation B) Optimized load redistribution C) Fire suppression D) Increasing floor area
A) The North Tower B) Neither tower C) Both towers D) The South Tower
A) 35 ft B) 60 ft C) 20 ft D) 50 ft
A) Wind shear load B) Seismic vibration C) Gravity load D) Torsional load
A) Two B) Ten C) Four D) Six
A) November 9, 2001 B) September 1, 2001 C) September 11, 2001 D) September 11, 2005
A) United Airlines Flight 175 B) American Airlines Flight 11 C) American Airlines Flight 77 D) United Airlines Flight 93
A) Substandard design B) The fires C) Controlled demolition D) The initial plane impacts
A) 2014 B) 2010 C) 2005 D) 2001
A) 110 B) 100 C) 90 D) 120
A) NIST B) FEMA C) NASA D) FAA
A) Petronas Towers B) Empire State Building C) Chrysler Building D) Willis Tower
A) B-25 bomber B) DC 8 C) C-45F Expeditor D) Boeing 707
A) Fog B) High winds C) Snow D) Thunderstorm
A) Newark B) None of the above C) JFK D) LaGuardia
A) 300 mph B) 750 mph C) 600 mph D) 450 mph
A) A BBC reporter B) Leslie Robertson C) John Skilling D) NIST investigators
A) Information was classified B) Budgetary constraints C) Limited technical capability D) Lack of interest
A) Vermiculite plaster B) Gypsum board C) Cellulose insulation D) Concrete spray
A) Airbus A320 B) Boeing 737 C) Boeing 747 D) Boeing 767
A) 47 B) 26 C) 39 D) 34
A) 17th floor B) 99th floor C) 93rd floor D) 78th floor
A) Electromagnetic energy B) Compressed gas energy C) Kinetic heat energy D) Gravitational energy
A) Upwards B) Downwards C) Outwards only D) Towards the center core only
A) The top floors B) The bottom floors C) The basement levels D) The middle floors
A) 25 seconds B) 15 seconds C) 9 seconds D) 11 seconds
A) 100 stories B) 40 stories C) 25 stories D) 60 stories
A) 40 stories B) 110 stories C) 60 stories D) 25 stories
A) Bolts snapped B) Seismic activity C) Heat weakened the steel D) Impact from airplanes
A) Lateral shift phase B) Crush-down phase C) Initial impact phase D) Crush-up phase
A) They remained standing. B) They fused to the core. C) They peeled away. D) They buckled inward.
A) From the top B) From the bottom C) From the impact level D) From the center
A) Stairwell A B) Stairwell B C) Stairwell C D) Stairwell D
A) They refused to leave B) The speakers were broken C) Poor radio reception D) They were too high up to hear
A) The fire was chemical-based B) Lack of building access C) The building was already evacuated D) Low water pressure
A) Over 100 B) None C) 10 D) 50
A) The South Tower B) The North Tower C) The Verizon Building D) Fiterman Hall
A) The total tilt of the building B) The buckling of the lobby C) The shattering of all windows D) The crumble of the east mechanical penthouse
A) 2009 B) 2005 C) 2001 D) 2012
A) 90 West Street B) 30 West Broadway C) St. Nicholas Greek Orthodox Church D) 130 Cedar Street
A) 5 World Trade Center B) 30 West Broadway C) 130 Cedar Street D) 90 West Street
A) W. Gene Corley B) César Pelli C) Zdeněk P. Bažant D) Abolhassan Astaneh-Asl
A) Eduardo Kausel B) W. Gene Corley C) Franz-Josef Ulm D) Oral Buyukozturk
A) W. Gene Corley B) Abolhassan Astaneh-Asl C) Eduardo Kausel D) Zdeněk P. Bažant
A) FEMA B) MIT C) Northwestern University D) The University of California
A) 95% B) 50% C) 10% D) 25%
A) September 2001 B) October 2002 C) August 2002 D) May 2002
A) National Construction Safety Team bill B) The Disaster Relief and Recovery Bill C) The Building Security Act D) The Structural Integrity Reform Act
A) Ethanol B) Gasoline C) Kerosene D) Diesel
A) Below freezing B) Extremely high C) Constant and uniform D) Not unusual
A) Total cooling of the building interior B) Immediate structural collapse C) Immediate chemical neutralization of the steel D) Large fireballs
A) Yes B) Only in the North Tower C) Only in the South Tower D) No
A) The steel columns directly B) The buildings' contents C) The external glass facade D) The building's foundation
A) To a large commercial power generating station B) To a volcanic eruption C) To a nuclear reactor D) To a house fire
A) $10 million B) $20 million C) $16 million D) $6 million
A) LS-DYNA B) Fire Dynamics Simulator C) ANSYS D) AutoCAD
A) W. Gene Corley B) Shyam Sunder C) None of these D) James Quintiere
A) ANSYS B) Fire Dynamics Simulator C) LS-DYNA D) Revit
A) Decelerating speed B) Half of free fall acceleration C) Twice the rate of free fall D) Free fall acceleration
A) Jose L. Torero B) Asif Usmani C) Barbara Lane D) Controlled Demolition, Inc.
A) Controlled Demolition, Inc. B) City of New York Department of Design C) University of Edinburgh D) Arup
A) A legal lawsuit from residents B) Confrontations with firefighters C) A faster completion of the cleanup D) An apology from the EPA
A) Environmental Protection Agency B) University of Edinburgh C) Department of Design and Construction D) City of New York
A) Asthma B) Sinusitis C) Gastroesophageal reflux disease D) Asbestosis
A) Sinusitis B) Post-traumatic stress disorder C) Asthma D) Lung cancer
A) 2010 B) 2003 C) 2007 D) 2005 |