Colorado CNA Practice Exam

When taking an oral temperature, which type of thermometer is most commonly used?

1. Black-tipped thermometer

2. Red-tipped thermometer

3. Green-tipped thermometer

4. Blue-tipped thermometer

The correct answer is: Black-tipped thermometer

Oral temperatures are typically taken with a black-tipped thermometer, also known as a digital or electronic thermometer. This is because they are the most accurate and easy to read compared to the other options given. Red-tipped thermometers are usually used for underarm or axillary temperatures, green-tipped for forehead temperatures, and blue-tipped for rectal temperatures. These types of thermometers may not provide accurate or clear readings when used orally.