Free Interview Resources
Free practice questions, preparation advice, and expert insights for Biomedical Engineering interviews at Imperial College London.
Real Biomedical Engineering interview questions in the style Imperial College London asks. Try answering each one aloud before you reveal the hint.
You are shown a stress-strain graph for two candidate implant materials. Which material would you choose for a load-bearing implant and why?
Problem-Solving
Hint
Use stiffness, yield behaviour, toughness, fatigue, and biological compatibility rather than choosing the strongest material automatically.
Estimate the compressive stress on a circular hip-implant stem if a load is applied through it.
Problem-Solving
Hint
Start by estimating force from body weight, then divide by a plausible cross-sectional area and discuss assumptions.
A catheter radius is reduced by a small amount. How does that affect the pressure required to maintain the same flow rate?
Problem-Solving
Hint
Think about the fourth-power dependence on radius before doing any arithmetic.
You are given two noisy calibration graphs for a wearable pulse sensor. Which sensor is more useful clinically?
Problem-Solving
Hint
Compare sensitivity, noise, linearity, calibration drift, and the clinical decision the signal must support.
How would you decide between three design concepts for a vaccine-delivery device?
Problem-Solving
Hint
Rank criteria such as dose accuracy, safety, manufacturability, cold-chain needs, user training, and cost.
Structured interviews that combine technical problem-solving with motivation and personal statement discussion.
Imperial interviews vary by department. Engineering and Computing tend to be technical with problem-solving elements. Medicine uses a Multiple Mini Interview (MMI) format with several short stations. Most interviews last 15-30 minutes and may include a presentation or group exercise.
Interview Invitation
Late Nov
Arrival to Interview
Early Dec
Technical Question
Mid Dec
Decision
Early Jan
Interview Invitation
Late Nov
Arrival to Interview
Early Dec
Technical Question
Mid Dec
Decision
Early Jan
A medical image has high spatial resolution but poor contrast. What changes might improve diagnostic value, and what trade-offs might they introduce?
hardHint
Discuss acquisition physics, processing, dose or energy exposure, noise, and what the clinician needs to see.
What properties would you prioritise in a biomaterial that sits in contact with living tissue for several years?
midHint
Think beyond strength: surface chemistry, immune response, degradation, sterilisation, wear, and manufacturing route matter.
Explain the difference between sensitivity and specificity using a diagnostic device example.
entryHint
Use false positives and false negatives, then connect the trade-off to screening versus diagnosis.
How can engineering mathematics help in understanding the human body?
entryHint
Give one example involving forces, signals, transport, or feedback control rather than speaking only generally.
Why might a device that works well in a laboratory fail in a hospital or home-care setting?
midHint
Consider users, cleaning, calibration, noise, power, regulation, training, and patient variation.
What is the most difficult part of designing a prosthetic limb: mechanics, sensing, control, materials, or user adaptation?
midHint
Choose one, defend it, then explain how it interacts with the others.
Why do you want to study Biomedical Engineering at Imperial?
entryHint
Connect the department, the course content, and a specific healthcare-engineering interest rather than giving a generic London/STEM answer.
Why Biomedical Engineering rather than Medicine, Mechanical Engineering, Electrical Engineering, or Molecular Bioengineering?
entryHint
Separate patient-facing medicine from device, systems, modelling, instrumentation, and design-led engineering.
Choose one claim from your personal statement and explain how you would test whether it is true.
midHint
Turn the claim into a measurable hypothesis, then identify controls, variables, and possible failure modes.
Tell me about a biomedical technology you have read about recently, and explain one limitation that is still unresolved.
midHint
Avoid a pure summary; explain the engineering constraint, such as measurement error, materials compatibility, power, cost, or clinical validation.
Explain a biomedical engineering concept from your reading to a patient with no science background.
midHint
Use an analogy, keep the mechanism accurate, and state what the concept does not explain.
If you could measure only one variable continuously in a patient after surgery, what would you measure and why?
hardHint
Define the patient and surgery, then justify the variable by risk, measurability, and clinical actionability.
A low-cost device is less accurate than a premium device but could reach many more patients. How would you decide whether it should be deployed?
midHint
Balance safety, evidence thresholds, clinical context, informed use, equity, and monitoring after deployment.
A wearable monitor could alert clinicians earlier, but it may also generate false alarms and worry patients. How would you decide whether it should be used?
midHint
Balance clinical benefit, false positives, patient consent, workload for staff, safety thresholds, and how the system would be reviewed after deployment.
12+ weeks
8-12 weeks
4-6 weeks
1-2 weeks
the week of
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Practice with an Imperial Biomedical Engineering graduate who's been through it.
Book Mock Interview →Further Reading
by John D. Enderle, Susan M. Blanchard and Joseph D. Bronzino
A broad introductory text listed in Yale's Frontiers of Biomedical Engineering course; useful for mapping the field.
by W. Mark Saltzman
Accessible overview by the Open Yale BENG 100 lecturer, strong for motivation and conceptual breadth.
by Y. C. Fung
Classic deeper reference for applicants who enjoy mechanics and want to understand tissue as material.
by Buddy D. Ratner, Allan S. Hoffman, Frederick J. Schoen and Jack E. Lemons
Excellent for biomaterials, tissue response, implants, and the medical-device design context.
by John G. Webster and Amit J. Nimunkar
Useful for students interested in sensors, measurement, bioelectric signals, and instrumentation.
by Open Yale Courses / W. Mark Saltzman
Free structured introduction to biomedical-engineering concepts and product-development case studies.
by MIT OpenCourseWare
Concise overview of bioengineering applications from prosthetics to imaging and artificial organs.
by NPTEL / IIT Madras
Good for imaging-system physics, reconstruction, and image-quality concepts.
by MIT OpenCourseWare
Strong preparation for biomaterials and implantable/injectable-device discussion.
by Imperial College London
Best place to understand the department's course family and disciplinary framing.