Explain the difference between open shop and closed shop. What will be an ideal ...

Ans. to #1

Open shop is when workers are not required to be a member of a union to work on a project. Closed shop is when workers are required to be a member of a union to work on a project.

Ans. to #2

A cooling-off period occurs when the president of the United States enjoins (forces) workers that are on strike to go back to work for ninety days while negotiations are underway to reach a new contract agreement if a strike creates a national emergency.

Ans. to #3

Scabs are nonunion workers that are used during strikes by employers to ensure that work at their job site is not interrupted during a strike.

Thanks a whole bunch, all were right.

Thanks for confirming...