Colorado CNA Practice Exam

An oral thermometer is usually color-coded:

1. Blue or red

2. Green or blue

3. Red or green

4. Yellow or blue

The correct answer is: Green or blue

The correct color-coding for oral thermometers is typically blue or red, with blue often indicating that it is for oral use. These colors help differentiate between the types of thermometers and indicate their appropriate use to prevent cross-contamination and ensure accurate readings. Oral thermometers are designed for use in the mouth, and using them properly is important for safety and accuracy in measuring body temperature. The other combinations you mentioned do not reflect standard practices for color-coding thermometers, which is why blue and red is a more commonly accepted answer.