National Occupational Competency Testing Institute (NOCTI) Cosmetology Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the National Occupational Competency Testing Institute (NOCTI) Cosmetology Exam with our extensive quizzes, flashcards, and detailed explanations. Boost your confidence and knowledge, and get ready for your exam!

Start Multiple Choice Practice Test
Start Flash Cards

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

In a typical tint formula using hair color shades, if 1-1/2 oz. of shade A is used, how much of shade B should be used if the ratio is 3 parts A to 1 part B?

  1. 1 oz

  2. 1/2 oz

  3. 2 oz

  4. 3 oz

The correct answer is: 1/2 oz

In a tint formula where the ratio of shade A to shade B is 3:1, this means for every 3 parts of shade A, there is 1 part of shade B. Given that 1-1/2 oz. of shade A is used, we can determine the amount of shade B required by first expressing 1-1/2 oz. of shade A in terms of a single part. The total parts in this ratio are 3 parts of A plus 1 part of B, making 4 total parts. If 1-1/2 oz. represents the 3 parts of shade A, we can find the size of a single part by dividing 1-1/2 oz. by 3. Calculating this, we have: 1-1/2 oz. = 1.5 oz. 1.5 oz. ÷ 3 = 0.5 oz. (this is the value of 1 part) Since shade B represents 1 part in the ratio, the amount of shade B needed will be equal to 0.5 oz. Therefore, when using 1-1/2 oz. of shade A in a 3 to 1 ratio

More Questions Like This