Water Operator Exam Audio Flash card Bundle

All 5 Sections of MP3 Audio flash cards for water Operator Exam preparation. These audio flash cards cover

• Operations and Maintenance
• Pumps and Motors 
• Chemical Disinfection
• rules and regulation
• safety and security

Audio flash cards nearly 4,000 word questions and terms for levels 1,2,3,4 water distribution and water treatment certification Exam. Listen and study on the go, anytime, anywhere.