NCCT Medical Assistant Clinical Skills 1 — Questions and Answers
Question 1: Which site is most commonly used for intramuscular injections in adults?
- Deltoid muscle
- Vastus lateralis
- Ventrogluteal muscle (Correct answer)
- Dorsogluteal muscle
Correct answer: Ventrogluteal muscle
The ventrogluteal site is preferred for IM injections in adults because it is free of major nerves and blood vessels.
Question 2: Normal adult resting heart rate range is:
- 40–60 bpm
- 60–100 bpm (Correct answer)
- 100–120 bpm
- 50–80 bpm
Correct answer: 60–100 bpm
A normal adult resting heart rate is 60–100 beats per minute.
Question 3: When measuring blood pressure, the cuff should be placed how far above the antecubital fossa?
- 1–2 cm (Correct answer)
- 2–3 cm
- 4–5 cm
- 5–7 cm
Correct answer: 1–2 cm
The blood pressure cuff should be placed 1–2 cm above the antecubital fossa to allow proper stethoscope placement.
Question 4: Which type of thermometer is contraindicated in patients with tympanic membrane perforation?
- Oral
- Axillary
- Tympanic (ear) (Correct answer)
- Rectal
Correct answer: Tympanic (ear)
Tympanic thermometers are contraindicated when a perforated tympanic membrane is present because they measure ear canal temperature.
Question 5: Which gauge needle is typically used for routine adult subcutaneous injections?
- 16–18 gauge
- 18–20 gauge
- 23–25 gauge (Correct answer)
- 27–30 gauge
Correct answer: 23–25 gauge
A 23–25 gauge needle is standard for subcutaneous injections, minimizing tissue trauma.
Question 6: When performing a 12-lead ECG, lead V4 electrode is placed at:
- 4th intercostal space, right sternal border
- 5th intercostal space, left sternal border
- 5th intercostal space, midclavicular line (Correct answer)
- 5th intercostal space, anterior axillary line
Correct answer: 5th intercostal space, midclavicular line
V4 is placed at the 5th intercostal space at the midclavicular line on the left side.
NCCT Medical Assistant Clinical Skills 1
Which site is most commonly used for intramuscular injections in adults?