Question: what are good bicep workouts with dumbbells?
Answer: 1 Single arm dumbbell preacher curl. Sets 3 Reps 6-8 Rest 90sec. Holding a dumbbell, place the working arm on top of the preacher bench. ... 
2 Incline dumbbell curl. Sets 3 Reps 8-10 Rest 90sec. ... 
3 Dumbbell hammer curl. Sets 3 Reps 10-12 Rest 90sec.