List and explain the strikes that are illegal under federal law

What will be an ideal response?

The following types of strikes are considered unlawful under federal labor law:
1. Violent strikes. In violent strikes, striking employees cause substantial damage to property of the employer or a third party. Courts usually tolerate a certain amount of isolated violence before finding that an entire strike is illegal.
2. Sit-down strikes. In sit-down strikes, striking employees continue to occupy the employer's premises. Such strikes are illegal because they deny the employer's statutory right to continue its operations during the strike.
3. Partial or intermittent strikes. In partial strikes, or intermittent strikes, employees strike part of the day or workweek and work the other part. This type of strike is illegal because it interferes with the employer's right to operate its facilities at full operation.
4. Wildcat strikes. In wildcat strikes, individual union members go on strike without proper authorization from the union. The courts have recognized that a wildcat strike becomes lawful if it is quickly ratified by the union.