2024 WA CDL Practice Test: All - Test Based on 2024 WA CDL Handbook 17. Every ____ miles (or every three hours, whichever comes first), you should make sure the cargo is secure. A 50 B 225 C 250 D 150 Next More 17/30 Progress 0 Errors Restart Next Next All - Test Back to Test List Air Brakes - Test All - Test 2 Challenge Library 12 More WA CDL Practice Tests 36 All - Test 2 37 All - Test 3 38 Tank and Hazmat - Test 39 Tank and Hazmat - Test 2 40 Class C - Test 41 Class C - Test 2 42 Class C - Test 3 43 Class C - Test 4 44 Class C - Test 5 45 Bus - Test