NIC Barber Written (Theory) ExamScientific ConceptsEasy
A barber is preparing a new batch of disinfectant solution. The instructions state to dilute 0.5 ounces of concentrated disinfectant with 1 gallon of water. If the barber needs to make 3 gallons of solution, how much concentrated disinfectant is needed?
- A1.0 ounces
- B0.5 ounces
- C2.0 ounces
- D1.5 ounces
Show answer & explanationAnswer & explanation
Correct answer: D. 1.5 ounces
To make 3 gallons of solution, the barber needs 3 times the amount of concentrated disinfectant required for 1 gallon. Therefore, 0.5 ounces/gallon * 3 gallons = 1.5 ounces.
Why the other options are wrong
- A. This would be the amount for 2 gallons, not 3 gallons.
- B. This is the amount for 1 gallon, not 3 gallons.
- C. This would be the amount for 4 gallons, not 3 gallons.
Disinfectant Dilution Calculation
The process of accurately mixing concentrated disinfectant with water according to manufacturer's instructions to achieve the correct strength.
- Follow manufacturer's instructions precisely.
- Ratio of concentrate to water is crucial.
- Incorrect dilution can be ineffective or damaging.
- Use appropriate measuring tools.
Memory trick: Multiply the concentrate by the gallons needed, it's a simple scale!