Nursing assistant (CNA) knowledge worksheet with answers

For most healthy adults, which pulse oximeter (oxygen saturation) reading is normal?

1. A60% to 65%
2. B70% to 75%
3. C95% to 100%
4. D80% to 85%

What is a hallucination?

1. AMisreading something that is really there, like a coat seen as a person
2. BSeeing, hearing or feeling something that is not really there
3. CForgetting where something was put
4. DA false belief that is held even when proof shows it is wrong

How should a nursing assistant turn off a hand-operated faucet after washing and drying the hands?

1. AWith a clean, dry paper towel
2. BWith the clean bare hands
3. CBy leaving the water running for the next person
4. DWith the wet hands before drying them

How should the drainage tubing of a urinary catheter be arranged while the resident is in bed?

1. ALooped below the bag so urine collects in the loop
2. BTucked under the resident's leg to hold it in place
3. CTied in a knot to keep it from moving
4. DCoiled on the bed, secured and free of kinks

A resident with an intellectual disability is learning to make his own bed. Which approach helps most?

1. ATeach one simple step at a time, praise success and be patient
2. BMake the bed for him because it is faster
3. CCorrect every mistake in front of others
4. DExplain all the steps at once, then leave him to try it on his own

How is a resident who cannot stand usually weighed?

1. ABy asking the resident to stand on the upright scale anyway, with help
2. BBy guessing the weight from the resident's height
3. CWith a chair, wheelchair or bed scale, as the facility provides
4. DBy weighing the resident's clothes and subtracting

A resident with an ileostomy has red, sore skin around the stoma. Why is the skin around an ileostomy at special risk?

1. AThe pouch is changed too often and pulls off the skin
2. BThe resident's skin is allergic to the stoma itself
3. CThe output is hard and dry and scrapes the skin as it passes
4. DIts liquid output contains enzymes that irritate the skin

A resident's catheter bag has only about 50 mL of dark urine after the whole shift; usually it holds about 600 mL. What should the nursing assistant do first?

1. AEncourage the resident to drink and recheck at the next shift
2. BCheck that the tubing is not kinked or under the resident, then report to the nurse
3. CDisconnect the tubing to see whether urine flows freely
4. DRecord the amount as usual without reporting it