Good communication skill is one of the best skill to motivate a team. A good leader should speak out well and that gives the confident the co-workers. If a person gains the confidence he will be ready to face any kind of challenge. For a challenge, than the capacity of a person confidence matters more. An optimistic attitude creates lot of achievements.

Yes, the level of motivation of the project manager affects the team and team members. The PM is the leader who is in charge of everything. He is the captain of the ship. Only if the captain in the ship is motivates and has confidence on himself and his team members, then they can struggle and come out of their hardships easily. If the captain does not have enough confident then everything will get messed up. So PM motivation plays a predominant role in any industry.