How to Use "effectual" with Example Sentences

1. The government should take effectual measures to combat unemployment .
2. Industry cluster is an effectual platform and mode .
3. The board may transact any of its business by circulation of papers , and a resolution in writing which is approved in writing by a majority of the members shall be as valid and effectual as if it had been passed at a meeting of the board .
4. This fasting is real effectual .
5. Quinine is effectual preventive for malaria .