Nebraska Barber State Practice Exam

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Prepare for the Nebraska Barber State Exam with our comprehensive study material. Utilize interactive quizzes with hints and detailed explanations to master barbering techniques and ace your exam!

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Which percentage of isopropyl alcohol can disinfect shears or razors?

The correct answer is: 99%

Isopropyl alcohol is commonly used as a disinfectant because it is an effective agent against germs, bacteria, and viruses. In order for it to effectively disinfect shears or razors, the concentration of isopropyl alcohol needs to be high enough. Option D, 99%, is the best percentage for disinfecting purposes as it kills a larger percentage of germs compared to the other options. Option A (70%), B (75%), and C (90%) may still have some bacteria or germs remaining due to a lower alcohol concentration. Therefore, D, 99%, is the most effective percentage for disinfecting shears or razors.