AMC CAT MCQ sample questions with answers
Preparing for the Australian Medical Council (AMC) Computer-Adaptive Test (Multiple Choice Examination) is a critical step for International Medical Graduates (IMGs) aiming for AHPRA medical registration in Australia via the Standard Pathway. The exam is a 210-minute computer-adaptive test with no negative marking, and each correct answer scores 1 mark. The difficulty adjusts in real time based on your performance. To help you understand the question style and depth required, we have compiled 6 sample questions across three difficulty levels: easy, moderate, and advanced. Each question is followed by the correct answer and a detailed explanation. Always confirm the latest dates, fees and eligibility on the exam provider's official site before applying.
Easy-level sample questions
Question 1 A 35-year-old woman presents with a 2-week history of fatigue, pallor, and shortness of breath on exertion. Her blood tests show: Hb 8.0 g/dL, MCV 78 fL, serum ferritin 12 ng/mL. Which of the following is the most likely diagnosis?
A) Thalassaemia minor B) Iron deficiency anaemia C) Anaemia of chronic disease D) Vitamin B12 deficiency
Answer: B) Iron deficiency anaemia
Explanation: The combination of microcytic hypochromic anaemia (low MCV) with very low serum ferritin is classic for iron deficiency anaemia. Thalassaemia minor would also show microcytosis but ferritin is usually normal or elevated. Anaemia of chronic disease is typically normocytic or mildly microcytic with normal or high ferritin. Vitamin B12 deficiency causes macrocytic anaemia.
Question 2 A 60-year-old male with type 2 diabetes mellitus and hypertension is started on an ACE inhibitor. Which of the following laboratory parameters should be monitored most closely?
A) Serum potassium B) Serum sodium C) Serum calcium D) Serum phosphate
Answer: A) Serum potassium
Explanation: ACE inhibitors can cause hyperkalaemia by reducing aldosterone secretion, especially in patients with renal impairment or those taking potassium-sparing diuretics. Monitoring serum potassium is essential. Sodium, calcium, and phosphate are not directly affected by ACE inhibitors.
Moderate-level sample questions
Question 3 A 45-year-old woman presents with acute onset of severe epigastric pain radiating to the back, nausea, and vomiting. She has a history of gallstones. Serum amylase is 1200 U/L. Which of the following is the most appropriate initial imaging study?
A) Abdominal X-ray B) CT scan of the abdomen with contrast C) Ultrasound of the abdomen D) MRI of the abdomen
Answer: C) Ultrasound of the abdomen
Explanation: In suspected acute pancreatitis, ultrasound is the initial imaging of choice to assess for gallstones as the cause. CT scan is reserved for complications or if diagnosis is uncertain. Abdominal X-ray may show sentinel loop but is less sensitive. MRI is not first-line.
Question 4 A 70-year-old man with chronic obstructive pulmonary disease (COPD) presents with increasing dyspnoea and cough with purulent sputum. Arterial blood gas on room air shows: pH 7.32, PaCO2 65 mmHg, PaO2 55 mmHg, HCO3- 30 mEq/L. Which acid-base disorder is present?
A) Acute respiratory acidosis B) Chronic respiratory acidosis C) Metabolic acidosis with respiratory compensation D) Mixed respiratory acidosis and metabolic alkalosis
Answer: B) Chronic respiratory acidosis
Explanation: The elevated PaCO2 (65 mmHg) indicates respiratory acidosis. The HCO3- is elevated (30 mEq/L), suggesting renal compensation. The pH is only mildly acidic (7.32), which is consistent with a chronic process (kidneys have had time to retain bicarbonate). In acute respiratory acidosis, HCO3- would be near normal. The pattern does not suggest a primary metabolic disorder.
Advanced/hard sample questions
Question 5 A 30-year-old woman presents with a 3-month history of intermittent fever, arthralgia, and a malar rash. Laboratory findings: positive ANA (1:640, speckled pattern), anti-dsDNA antibodies elevated, low C3 and C4. Urinalysis shows proteinuria 2+. Which of the following is the most appropriate next step in management?
A) Start hydroxychloroquine alone B) Start high-dose corticosteroids and refer to rheumatology C) Perform a renal biopsy D) Start methotrexate
Answer: C) Perform a renal biopsy
Explanation: This patient has systemic lupus erythematosus (SLE) with clinical and laboratory evidence of renal involvement (proteinuria, low complement, elevated anti-dsDNA). A renal biopsy is indicated to classify the lupus nephritis class and guide treatment. Hydroxychloroquine is used for mild SLE but not alone with active nephritis. High-dose corticosteroids may be started after biopsy results. Methotrexate is not first-line for lupus nephritis.
Question 6 A 55-year-old man with a history of hypertension and smoking presents with sudden onset of severe, tearing chest pain radiating to the back. Blood pressure is 180/100 mmHg in the right arm and 140/80 mmHg in the left arm. Chest X-ray shows a widened mediastinum. Which of the following is the most definitive diagnostic test?
A) CT angiography of the chest B) Transthoracic echocardiogram C) MRI of the chest D) Coronary angiography
Answer: A) CT angiography of the chest
Explanation: The presentation is classic for aortic dissection. CT angiography of the chest is the most definitive and rapidly available test to confirm the diagnosis and assess the extent of dissection. Transthoracic echocardiogram may show a flap but is less sensitive. MRI is time-consuming. Coronary angiography is not indicated for dissection.
How to interpret distractors
In AMC CAT MCQ, each question typically has four options. The exam is designed to test not only recall but also clinical reasoning. Distractors are plausible but incorrect answers that often reflect common misconceptions or partial knowledge. Here are strategies to handle them:
- Look for the most specific finding: The correct answer is usually the one that best fits the entire clinical picture, not just one feature.
- Eliminate extremes: Options that are too aggressive or too conservative for the scenario are often wrong.
- Use the 'most likely' mindset: The exam asks for the most likely diagnosis or next step, not every possible option.
- Watch for 'red herrings': Normal lab values or irrelevant history may be included to mislead. Focus on key positive and negative findings.
- Practice with real questions: The more you practice, the better you become at spotting patterns. Our mock tests on PractiseExam.com include hundreds of AMC-style questions with detailed explanations to sharpen this skill.
Take a free full mock test
Ready to test your knowledge under real exam conditions? PractiseExam.com offers a free full-length AMC CAT MCQ mock test that simulates the computer-adaptive format, time pressure, and question difficulty. You will receive a detailed performance report highlighting your strengths and areas for improvement. Visit our AMC CAT MCQ mock tests page to start your free test today. Combine this with our preparation strategy guide and best books for AMC to build a complete study plan. Remember, consistent practice with high-quality sample questions is the key to passing the AMC CAT MCQ on your first attempt.