NIC Nail Technician Written ExamScientific ConceptsEasy
A technician is preparing a 1:100 solution of a concentrate disinfectant. If the disinfectant manufacturer specifies using 1 ounce of concentrate per gallon of water for this dilution, how much concentrate is needed for a 5-gallon container?
- A20 ounces
- B2 ounces
- C5 ounces
- D10 ounces
Show answer & explanationAnswer & explanation
Correct answer: C. 5 ounces
If 1 ounce of concentrate is needed per gallon of water, then for a 5-gallon container, you would multiply the concentrate amount per gallon by the number of gallons: 1 ounce/gallon * 5 gallons = 5 ounces.
Why the other options are wrong
- A. Incorrect calculation; 20 ounces would be for 20 gallons.
- B. Incorrect calculation; 2 ounces would be for 2 gallons.
- D. Incorrect calculation; 10 ounces would be for 10 gallons.
Disinfectant Dilution
The process of mixing a concentrated disinfectant with water to achieve the correct and effective strength for use.
- Always follow manufacturer's instructions.
- Incorrect dilution can reduce effectiveness or cause harm.
- Measure accurately for safety and efficacy.
Memory trick: Ratio Rules: Always Read Instructions.