New Jersey Barber and Hairstyling Practice Exam

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Prepare for the New Jersey Barber and Hairstyling licensing exam with practice tests. Cover all topics with hints and detailed explanations. Enhance your chances of passing!

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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.