TL;DR
Learn proper body mechanics for safe patient transfers and correct positioning techniques. These skills prevent injuries to both caregivers and patients and are core competencies on the CNA Written Examination (NNAAP).
Free Body Mechanics & Oxygen Safety Practice Questions
CNA Written Examination (NNAAP) · Safety & Infection Control
This module covers Body Mechanics & Oxygen Safety as part of the Safety & Infection Control section, testing your understanding of core concepts and their practical application.
| Exam | CNA Written Examination (NNAAP) |
| Pass Rate | 87% |
| Duration | 90 minutes |
| Module | Body Mechanics & Oxygen Safety |
Why Body Mechanics & Oxygen Safety matters
Body Mechanics & Oxygen Safety is heavily weighted on the CNA Written Examination (NNAAP) because lapses in safety protocols directly threaten patient outcomes.
Sample Practice Questions (5)
1. A resident is receiving oxygen through a nasal cannula. The CNA should understand that oxygen:
- Is not flammable and poses no fire risk
- Supports and intensifies combustion, so open flames, smoking, and electrical sparks must be kept away
- Can be adjusted by the CNA to any flow rate the resident requests
- Should be turned off during meals to prevent choking
2. When lifting or moving a heavy object, the CNA should keep the object:
- As far from the body as possible with arms extended
- Close to the body at waist level to reduce strain on the back
- Above shoulder height for better visibility
- Behind the back to improve balance
3. When raising the head of the bed for a resident, the CNA should adjust the bed to the requested position. However, for a resident at risk for pressure injuries, the head of the bed should NOT exceed:
- 90 degrees unless medically necessary
- 30 degrees unless eating or medically indicated, to minimize shearing forces
- Any elevation at all — the bed must always be flat
- 60 degrees since that is the maximum safe angle for all residents
Want more practice like this?
Start practicing free →4. A resident on oxygen therapy has a nasal cannula that is causing irritation behind the ears and under the nose. The CNA should:
- Remove the oxygen since it is causing skin problems
- Pad the tubing behind the ears with gauze or foam and report the skin irritation to the nurse
- Increase the oxygen flow rate to reduce the amount of time the resident needs it
- Replace the nasal cannula with a paper towel to reduce friction
5. When carrying a heavy object, the CNA should hold it:
- At arm's length away from the body
- Close to the body at waist level
- Above shoulder height for better visibility
- On one hip to free the other hand
Ready to practice for the CNA Written Examination (NNAAP)?
Adaptive practice powered by Item Response Theory targets your weak areas. Start with 3 free sessions.
Start free practice →