CNA Practice Test
Vital signs and reportingQuestion 509 of 1700

Which probe do you use to take a rectal temperature?

  1. The red probe
  2. The blue probe
  3. The probe used for the tympanic reading
  4. The probe used for the oral reading
Show answer

Correct answer: The red probe

The rectal probe is red, so it is not mixed up with the blue oral and axillary probe.

Source: Nursing Assistant (Reuter), 7.8: Skills Checklist- Oral Tympanic Axillary Rectal and Temporal Temperatures

Practice vital signs and reporting

Questions last reviewed: 18 October 2026