The New Jersey Turnpike Authority’s proposed $6.2 billion replacement of the Newark Bay Bridge got a mixed reception — with objectors chanting their disapproval — at a public forum about it on Tuesday. The vocal demonstration was to protest the “total lack of public engagement,” with the project, said John Reichman, an organizer of the Turnpike Trap coalition. “At no time did they allow any public comment or questions,” he said. “The public has a right to speak and ask questions.” Tuesday’s event was billed as a public listening session, where attendees could ask questions of engineers and oth…