NWCA CET TEST PRACTICE | 200 EXPERT QUESTIONS AND
CORRECT ANSWERS PLUS RATIONALES (VERIFIED
ANSWERS) | 100% PASS GUARANTEED| LATEST 2026
UPDATE ALREADY GRADED A+
1. A 68-year-old male presents with chest pain. His EKG shows ST-segment elevation in leads II, III, and aVF.
Which coronary artery is most likely occluded?
A) Left anterior descending artery
B) Right coronary artery
C) Circumflex artery
D) Left main coronary artery
Answer: B ST elevation in inferior leads (II, III, aVF) indicates inferior wall myocardial infarction, typically caused
by occlusion of the right coronary artery.
2. Which layer of the heart is responsible for contracting to pump blood?
A) Epicardium
B) Myocardium
C) Endocardium
D) Pericardium
Answer: B The myocardium is the muscular middle layer of the heart wall that contracts to pump blood through
the circulatory system.
3. What is the primary function of the tricuspid valve?
A) Prevents backflow from left ventricle to left atrium
B) Prevents backflow from right ventricle to right atrium
C) Prevents backflow from aorta to left ventricle
D) Prevents backflow from pulmonary artery to right ventricle
Answer: B The tricuspid valve is located between the right atrium and right ventricle, closing during ventricular
systole to prevent regurgitation of blood.
4. During the cardiac cycle, diastole refers to which phase?
A) Contraction of the ventricles
1|Pa g e SUCCESS!!!
,B) Relaxation of the heart chambers
C) Ejection of blood into the aorta
D) Filling of the atria with blood
Answer: B Diastole is the phase of the cardiac cycle when the heart chambers relax and fill with blood.
5. Which valves open and allow the ventricles to fill?
A) Aortic and Pulmonic valves
B) Tricuspid and Mitral valves
C) Mitral and Aortic valves
D) Tricuspid and Pulmonic valves
Answer: B During diastole, the atrioventricular valves (tricuspid on the right, mitral on the left) open to allow
blood to flow from the atria into the ventricles.
6. The layer of the heart that is damaged during a heart attack is the:
A) Epicardium
B) Pericardium
C) Myocardium
D) Endocardium
Answer: C The myocardium is the muscular middle layer of the heart wall; myocardial infarction involves death
of myocardial tissue due to lack of oxygen.
7. The inferior vena cava returns oxygen-depleted blood to the heart from the:
A) Upper part of the body
B) Lungs
C) Lower part of the body
D) Coronary arteries
Answer: C The inferior vena cava carries deoxygenated blood from the lower extremities, abdomen, and pelvis
back to the right atrium.
8. The pulmonary veins deliver blood to the:
A) Right atrium
B) Left atrium
2|Pa g e SUCCESS!!!
,C) Right ventricle
D) Left ventricle
Answer: B The four pulmonary veins carry oxygenated blood from the lungs to the left atrium, which then
pumps it into the left ventricle.
9. The ventricles' intrinsic firing rate is between:
A) 60 and 100 bpm
B) 40 and 60 bpm
C) 20 and 40 bpm
D) 0 and 20 bpm
Answer: C The ventricles have an intrinsic escape rhythm of 20–40 bpm if higher pacemakers (SA node, AV node)
fail.
10. The cardiac cycle's two phases are:
A) Systole and repolarization
B) Diastole and depolarization
C) Systole and diastole
D) Contraction and relaxation
Answer: C Systole is contraction/ejection; diastole is relaxation/filling; together they form one complete cardiac
cycle.
11. Depolarization is best defined as:
A) Cell becomes more negative and relaxes
B) Cell becomes less negative and contracts
C) Cell returns to resting potential
D) Cell stops conducting electricity
Answer: B Depolarization occurs when sodium ions enter the cell, making the membrane potential less negative,
triggering contraction.
12. Which criteria represent a patient in normal sinus rhythm?
A) Rate 40-60, irregular intervals
B) Rate 60-100, equal R-R intervals
3|Pa g e SUCCESS!!!
, C) Rate 100-150, variable P waves
D) Rate 20-40, wide QRS
Answer: B Normal sinus rhythm requires a rate of 60–100 bpm, regular R-R intervals, one P wave before each
QRS complex.
13. Each large box on standard ECG paper (five small boxes) is equal to:
A) 0.04 seconds
B) 0.12 seconds
C) 0.20 seconds
D) 0.40 seconds
Answer: C At standard paper speed of 25 mm/sec, each large box (5 mm) represents 0.20 seconds.
14. The P wave on an ECG represents:
A) Depolarization of the ventricles
B) Repolarization of the atria
C) Depolarization of the atria
D) Repolarization of the ventricles
Answer: C The P wave corresponds to electrical activity in the atria before contraction (atrial depolarization).
15. The QRS complex on an ECG represents:
A) Depolarization of the atria
B) Repolarization of the ventricles
C) Depolarization of the ventricles
D) Repolarization of the atria
Answer: C The QRS complex represents ventricular depolarization, the electrical activation of the ventricles that
triggers contraction.
16. What is the QT interval?
A) Measure from beginning of P wave to end of T wave
B) Measure from beginning of QRS complex to end of T wave
C) Measure from end of QRS to beginning of T wave
4|Pa g e SUCCESS!!!
CORRECT ANSWERS PLUS RATIONALES (VERIFIED
ANSWERS) | 100% PASS GUARANTEED| LATEST 2026
UPDATE ALREADY GRADED A+
1. A 68-year-old male presents with chest pain. His EKG shows ST-segment elevation in leads II, III, and aVF.
Which coronary artery is most likely occluded?
A) Left anterior descending artery
B) Right coronary artery
C) Circumflex artery
D) Left main coronary artery
Answer: B ST elevation in inferior leads (II, III, aVF) indicates inferior wall myocardial infarction, typically caused
by occlusion of the right coronary artery.
2. Which layer of the heart is responsible for contracting to pump blood?
A) Epicardium
B) Myocardium
C) Endocardium
D) Pericardium
Answer: B The myocardium is the muscular middle layer of the heart wall that contracts to pump blood through
the circulatory system.
3. What is the primary function of the tricuspid valve?
A) Prevents backflow from left ventricle to left atrium
B) Prevents backflow from right ventricle to right atrium
C) Prevents backflow from aorta to left ventricle
D) Prevents backflow from pulmonary artery to right ventricle
Answer: B The tricuspid valve is located between the right atrium and right ventricle, closing during ventricular
systole to prevent regurgitation of blood.
4. During the cardiac cycle, diastole refers to which phase?
A) Contraction of the ventricles
1|Pa g e SUCCESS!!!
,B) Relaxation of the heart chambers
C) Ejection of blood into the aorta
D) Filling of the atria with blood
Answer: B Diastole is the phase of the cardiac cycle when the heart chambers relax and fill with blood.
5. Which valves open and allow the ventricles to fill?
A) Aortic and Pulmonic valves
B) Tricuspid and Mitral valves
C) Mitral and Aortic valves
D) Tricuspid and Pulmonic valves
Answer: B During diastole, the atrioventricular valves (tricuspid on the right, mitral on the left) open to allow
blood to flow from the atria into the ventricles.
6. The layer of the heart that is damaged during a heart attack is the:
A) Epicardium
B) Pericardium
C) Myocardium
D) Endocardium
Answer: C The myocardium is the muscular middle layer of the heart wall; myocardial infarction involves death
of myocardial tissue due to lack of oxygen.
7. The inferior vena cava returns oxygen-depleted blood to the heart from the:
A) Upper part of the body
B) Lungs
C) Lower part of the body
D) Coronary arteries
Answer: C The inferior vena cava carries deoxygenated blood from the lower extremities, abdomen, and pelvis
back to the right atrium.
8. The pulmonary veins deliver blood to the:
A) Right atrium
B) Left atrium
2|Pa g e SUCCESS!!!
,C) Right ventricle
D) Left ventricle
Answer: B The four pulmonary veins carry oxygenated blood from the lungs to the left atrium, which then
pumps it into the left ventricle.
9. The ventricles' intrinsic firing rate is between:
A) 60 and 100 bpm
B) 40 and 60 bpm
C) 20 and 40 bpm
D) 0 and 20 bpm
Answer: C The ventricles have an intrinsic escape rhythm of 20–40 bpm if higher pacemakers (SA node, AV node)
fail.
10. The cardiac cycle's two phases are:
A) Systole and repolarization
B) Diastole and depolarization
C) Systole and diastole
D) Contraction and relaxation
Answer: C Systole is contraction/ejection; diastole is relaxation/filling; together they form one complete cardiac
cycle.
11. Depolarization is best defined as:
A) Cell becomes more negative and relaxes
B) Cell becomes less negative and contracts
C) Cell returns to resting potential
D) Cell stops conducting electricity
Answer: B Depolarization occurs when sodium ions enter the cell, making the membrane potential less negative,
triggering contraction.
12. Which criteria represent a patient in normal sinus rhythm?
A) Rate 40-60, irregular intervals
B) Rate 60-100, equal R-R intervals
3|Pa g e SUCCESS!!!
, C) Rate 100-150, variable P waves
D) Rate 20-40, wide QRS
Answer: B Normal sinus rhythm requires a rate of 60–100 bpm, regular R-R intervals, one P wave before each
QRS complex.
13. Each large box on standard ECG paper (five small boxes) is equal to:
A) 0.04 seconds
B) 0.12 seconds
C) 0.20 seconds
D) 0.40 seconds
Answer: C At standard paper speed of 25 mm/sec, each large box (5 mm) represents 0.20 seconds.
14. The P wave on an ECG represents:
A) Depolarization of the ventricles
B) Repolarization of the atria
C) Depolarization of the atria
D) Repolarization of the ventricles
Answer: C The P wave corresponds to electrical activity in the atria before contraction (atrial depolarization).
15. The QRS complex on an ECG represents:
A) Depolarization of the atria
B) Repolarization of the ventricles
C) Depolarization of the ventricles
D) Repolarization of the atria
Answer: C The QRS complex represents ventricular depolarization, the electrical activation of the ventricles that
triggers contraction.
16. What is the QT interval?
A) Measure from beginning of P wave to end of T wave
B) Measure from beginning of QRS complex to end of T wave
C) Measure from end of QRS to beginning of T wave
4|Pa g e SUCCESS!!!
