CNA practice test (nurse aide knowledge exam practice): cram pack

Formula sheets, the key method steps for every topic and 4 practice problems, with full solutions at the back.

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1Formulas and methods

Nursing assistant (CNA) knowledge

Method

  1. Check whether the resident is in danger right now (not breathing, choking, a fall, chest pain, stroke signs); if so, keep them safe and get the nurse at once.
  2. Ask whether the task is within the nursing assistant’s scope and training; if not, decline politely and tell the nurse.
  3. Respect the resident’s rights: privacy, choice, refusal of care, dignity and freedom from abuse and unneeded restraints.
  4. Apply the basic rules: hand hygiene, body mechanics, bed low and call light within reach, weak side first when dressing.
  5. Observe and report: compare with the resident’s usual state and report changes promptly and objectively.

Nursing math & unit conversions

Metric steps
1 kg = 1000 g, 1 g = 1000 mg, 1 mg = 1000 mcg, 1 L = 1000 mL
Weight and length
1 kg = 2.2 lb, 1 lb = 16 oz, 1 in = 2.54 cm, 1 ft = 12 in
Household measures
1 tsp = 5 mL, 1 tbsp = 15 mL, 1 fl oz = 30 mL, 1 cup = 8 fl oz = 240 mL
Temperature
°C = (°F − 32)·5/9, °F = °C·9/5 + 32
24-hour clock
PM hours 1–11: add 12; 12 AM = 00:xx; 12 PM = 12:xx
Dose rate
mcg/min × 60/1000 = mg/h
Laboratory factors
glucose 1 mmol/L = 18 mg/dL; creatinine 1 mg/dL = 88.4 µmol/L; Hb 1 g/dL = 10 g/L

Method

  1. Write the given quantity with its unit and the unit you want.
  2. Pick the equivalent: 1000 between kg, g, mg and mcg or L and mL; 1 kg = 2.2 lb; 1 tsp = 5 mL, 1 tbsp = 15 mL, 1 fl oz = 30 mL, 1 cup = 240 mL.
  3. Write it as a fraction so that the unwanted unit cancels; for a rate, use one fraction per unit that changes.
  4. Check the direction: a smaller unit gives a bigger number.
  5. Round only the final answer, to the precision the question names.

2Practice problems

1.Nursing assistant (CNA) knowledgeMedium

A dying resident shouts at staff and complains about everything. Which response is best?

  1. ATell him that other residents in his situation are much more polite
  2. BStay calm and see anger as part of grief, not a personal attack
  3. CSpeak sharply so that he knows his behavior is wrong
  4. DAvoid his room as much as possible until he calms down
2.Nursing assistant (CNA) knowledgeHard

A nursing assistant finds a pill on the floor of a resident's room. What should the nursing assistant do?

  1. APut it in the resident's drawer for later
  2. BThrow it in the trash can
  3. CGive it to the resident with a glass of water
  4. DGive it to the nurse and say where it was found
3.Nursing math & unit conversionsMedium
94969810010210410635363738394041°F°C99.8 °F? °C

Practice exercise (made-up values, not clinical guidance). A patient’s temperature is 99.8 °F. Convert it to degrees Celsius T with °C = (°F − 32) × 5/9. Round to one decimal place.

99.8 °F
T = °C
4.Nursing math & unit conversionsHard
3 fl oz? mL2 cups? mL3 tsp? mLΣ = ? mL

Practice exercise (made-up values, not clinical guidance). During a shift a patient takes 3 fl oz of juice, 2 cups of tea, 3 tsp of cough syrup. Using the equivalents given, find the total oral intake V in mL.

1 fl oz = 30 mL1 cup = 8 fl oz = 240 mL1 tsp = 5 mL
V = mL

3Solutions

1.Nursing assistant (CNA) knowledge

Answer: B · Stay calm and see anger as part of grief, not a personal attack

Why this is the answer

Anger is a common stage of grief, and it is often directed at caregivers. Staying calm, listening and continuing good care helps the resident. Avoiding him would leave him alone when he needs support.

Answer

B · Stay calm and see anger as part of grief, not a personal attack
2.Nursing assistant (CNA) knowledge

Answer: D · Give it to the nurse and say where it was found

Why this is the answer

A pill on the floor may mean a dose was missed or dropped. The nurse needs to know in order to check which medicine it is and what to do. Nursing assistants do not give or throw away medicines.

Answer

D · Give it to the nurse and say where it was found
3.Nursing math & unit conversions

Answer: T = 37.7 °C

Temperature: °C = (°F − 32) × 5/9 and °F = °C × 9/5 + 32. Subtract 32 before you multiply when going from °F, and add 32 after you multiply when going from °C. A quick check: 37 °C is 98.6 °F, and every 1 °C is 1.8 °F.

Subtract 32

99.8 − 32 = 67.8

Multiply by 5/9

T = 67.8·5/9 = 37.67 ≈ 37.7 °C

Answer

T = 37.7 °C
4.Nursing math & unit conversions

Answer: V = 585 mL

Household measures and weight: nursing exams use rounded equivalents: 1 teaspoon (tsp) = 5 mL, 1 tablespoon (tbsp) = 15 mL = 3 tsp, 1 fluid ounce (fl oz) = 30 mL = 2 tbsp, and 1 cup = 8 fl oz = 240 mL. For weight, 1 kg = 2.2 lb and 1 lb = 16 oz; for length, 1 inch = 2.54 cm. Set the conversion up so that the unit you do not want cancels out.

Each item in mL

3 fl oz = 3·30 = 90 mL
2 cups = 2·240 = 480 mL
3 tsp = 3·5 = 15 mL

Add

V = 90 + 480 + 15 = 585 mL

Answer

V = 585 mL

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