In the print window, choose “Save as PDF” to keep a copy on your device.
1Formulas and methods
Nursing assistant (CNA) knowledge
Method
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.
Ask whether the task is within the nursing assistant’s scope and training; if not, decline politely and tell the nurse.
Respect the resident’s rights: privacy, choice, refusal of care, dignity and freedom from abuse and unneeded restraints.
Apply the basic rules: hand hygiene, body mechanics, bed low and call light within reach, weak side first when dressing.
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
Write the given quantity with its unit and the unit you want.
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.
Write it as a fraction so that the unwanted unit cancels; for a rate, use one fraction per unit that changes.
Check the direction: a smaller unit gives a bigger number.
Round only the final answer, to the precision the question names.
2Practice problems
1.Nursing assistant (CNA) knowledgeMedium
Which entry is written correctly in a resident's record?
A"Resident was difficult at lunch."
B"Ate well today."
C"Seemed to enjoy her lunch very much, as usual."
D"Ate 50% of lunch. Drank 240 mL of milk."
2.Nursing assistant (CNA) knowledgeHard
A resident who sits in a wheelchair most of the day cannot shift her weight. Which plan protects her skin?
AMassage her tailbone firmly every few hours
BLeave her in one position all day if she says she is comfortable sitting that way
CSeat her on a donut-shaped ring cushion
DHelp her shift her weight or reposition her often, as the care plan directs
3.Nursing math & unit conversionsMedium
Practice exercise (made-up values, not clinical guidance). A dose is charted at 8:00 AM. Which entry is the same time on the 24-hour clock? Click it.
8:00 AM
120:00
208:00
307:00
409:00
4.Nursing math & unit conversionsHard
Practice exercise (made-up values, not clinical guidance). A haemoglobin result is 7.5 g/dL. Express it in g/L Hb.
7.5 g/dL1 L = 10 dL
Hb = g/L
3Solutions
1.Nursing assistant (CNA) knowledge
Answer: D · "Ate 50% of lunch. Drank 240 mL of milk."
Why this is the answer
Records must be factual, exact and objective. "Ate 50%" and "240 mL" can be measured, while "ate well" or "difficult" are vague opinions.
Answer
D · "Ate 50% of lunch. Drank 240 mL of milk."
2.Nursing assistant (CNA) knowledge
Answer: D · Help her shift her weight or reposition her often, as the care plan directs
Why this is the answer
Sitting puts heavy pressure on the tailbone and buttocks, so frequent repositioning as directed is essential. Ring cushions can reduce blood flow to the surrounding tissue, and massaging bony areas can damage tissue.
Answer
D · Help her shift her weight or reposition her often, as the care plan directs
3.Nursing math & unit conversions
Answer: 08:00
24-hour clock: from 1 PM onwards add 12 to the hour (3:45 PM = 15:45). Midnight to 12:59 AM is 00:00–00:59, and 12:00–12:59 PM stays 12:00–12:59. Going back, subtract 12 from hours 13–23 and add PM; hours 00 become 12 AM. Count time across midnight in two parts: up to 24:00 (00:00), then from 00:00 on.
Convert the hour
8 AM → 08
Answer
08:00
Answer
08:00
4.Nursing math & unit conversions
Answer: Hb = 75 g/L
Dimensional analysis: write the given quantity, then multiply by conversion factors written as fractions (for example 60 min/1 h or 1 mg/1000 mcg) so that each unwanted unit appears once on top and once underneath and cancels. When only the wanted unit is left, calculate. Use the equivalents the question gives and round only the final answer.
Convert
Hb = 7.5 g/dL × 10 dL/L = 75 g/L
Answer
Hb = 75 g/L
This is independent practice material. ExamProblems is not affiliated with or endorsed by the organisation that runs this exam, and the exam name is used only to describe the content.