Working sprinklers probably wouldn't have extinguished the burning jet fuel. In any event, the fuel burned off well before the collapse.
Working sprinklers probably would have kept the structural metal below it's softening point and prevented collapse.
Hint. If the sprinklers were working, the smoke would have been mixed with steam, and would be gray to white, not jet black.
Also here's a STRONG indication the sprinklers were tampered with:
This:
"The specter of terrorism and Sept. 11 emerged in Monday's hearing when DiScenza asked Nash if documents seized from the suspects had been examined.
She responded that a visitor's pass for the World Trade Center, dated Sept. 5, 2001, was found in Sakhera Hammad's wallet. Hammad told authorities he was a plumber and worked on the center's sprinkler system, Nash said. She also said that Abdelmuhsen Mahmid Hammad and Sakhera Hammad said they were cousins, and worked together in the plumbing business."
[emphasis added] On this thread:
Feds fear license examiner is dead - Memphis Woman's co-defendants tied to 9/11, judge told
I find it interesting that they chose to eliminate Kathrine Smith by burning her alive, just like the people in the WTC...
Intelligence indicating that al Qaeda terrorists are seeking to release a chemical or biological agent aboard an airliner, or transport a radiological device in cargo, prompted the cancellation of six international flights scheduled for today and tomorrow, senior administration officials familiar with the reports said yesterday.
The possibilities, as described by three intelligence officials, include releasing an undetectable biological agent such as smallpox or anthrax aboard a plane that passengers would then unknowingly spread; releasing a chemical agent to debilitate the passengers and crew so the plane could be hijacked, and sneaking a radiological device aboard a plane inside a piece of luggage.