Earthquake Engineering MCQ

Q1. Who proposed the theory of elastic rebound to explain earthquake origin?

Correct Answer: A

Harry Reid proposed the elastic rebound theory.

Q2. Which scale is commonly used for measuring earthquake magnitude?

Correct Answer: A

Richter scale measures earthquake magnitude.

Q3. What is the range of depth of focus for shallow earthquakes?

Correct Answer: A

Shallow earthquakes occur up to 70 km depth.

Q4. Which type of seismic wave causes most damage in earthquakes?

Correct Answer: A

Surface waves typically cause maximum ground shaking.

Q5. What is base isolation in earthquake engineering?

Correct Answer: A

Base isolation reduces seismic forces on structures.

Q6. Seismic retrofitting aims at:

Correct Answer: A

Retrofitting enhances existing building resilience.

Q7. What is meant by natural period of a structure?

Correct Answer: A

Natural period is duration of free vibration.

Q8. Which soil is most susceptible to liquefaction?

Correct Answer: A

Loose saturated sands liquefy under shaking.

Q9. The earthquake zone with maximum risk in India is:

Correct Answer: A

Zone V is the highest seismic risk area.

Q10. What is the function of a seismic hazard map?

Correct Answer: A

Seismic hazard maps assist in planning.

Q11. The Modified Mercalli Intensity scale measures:

Correct Answer: A

Mercalli scale quantifies observed earthquake effects.

Q12. What does the term "moment magnitude" represent?

Correct Answer: A

Moment magnitude relates to earthquake energy.

Q13. Which design approach incorporates dynamic analysis of structures under seismic loading?

Correct Answer: A

Response spectrum method models seismic loads dynamically.

Q14. The term "seismic base shear" refers to:

Correct Answer: A

Base shear is the design seismic lateral force.

Q15. Which is a common structural damping system?

Correct Answer: A

Viscous dampers reduce seismic vibrations.

Q16. Soil-structure interaction affects:

Correct Answer: A

SSI impacts building dynamics during earthquakes.

Q17. Which of the following increases earthquake resiliency?

Correct Answer: A

Flexibility allows energy dissipation.

Q18. What is an accelerograph?

Correct Answer: A

Accelerographs capture seismic accelerations.

Q19. The phenomenon of resonance in structures occurs when:

Correct Answer: A

Resonance leads to amplified oscillations.

Q20. The term (retrofit) in seismic engineering means:

Correct Answer: A

Retrofitting enhances earthquake resistance.

Q21. Which building materials improve earthquake resistance?

Correct Answer: A

RC and steel provide strength and ductility.

Q22. Seismic zonation maps indicate:

Correct Answer: A

Zonation maps guide construction accordingly.

Q23. Which of the following is a measure of building stiffness?

Correct Answer: A

Stiffness influences natural frequency.

Q24. Base isolation technique helps to:

Correct Answer: A

Isolators decouple building from ground shakes.

Q25. Dynamic analysis of structures requires:

Correct Answer: A

All three influence dynamic response.

Q26. An earthquakes epicenter is:

Correct Answer: A

Epicenter lies above the hypocenter.

Q27. Which seismic wave is the fastest?

Correct Answer: A

P waves are the fastest seismic waves.

Q28. What is the primary cause of an earthquake?

Correct Answer: A

Energy release causes seismic waves.

Q29. What kind of foundation is best for earthquake zones?

Correct Answer: A

Deep foundations transfer load to stable soil.

Q30. Which factor increases ground shaking during an earthquake?

Correct Answer: A

Soft soils amplify seismic waves.

Q31. What is liquefaction?

Correct Answer: A

Soil temporarily behaves like liquid when shaken.

Q32. The duration of strong ground motion is called:

Correct Answer: A

Strong ground motion duration affects damage.

Q33. Which organization provides seismic design codes?

Correct Answer: A

IS and others publish seismic codes.

Q34. Which term defines the speed at which a building oscillates?

Correct Answer: A

Natural frequency dictates oscillation speed.

Q35. The primary purpose of seismic design is:

Correct Answer: A

Design ensures safety under seismic events.

Q36. The term "response spectrum" refers to:

Correct Answer: A

Response spectrum helps design structures for seismic loads.

Q37. What is meant by damping in seismic design?

Correct Answer: A

Damping reduces oscillations.

Q38. Which type of retrofitting technique is cheapest and simplest?

Correct Answer: D

Restricting wall openings is cost-effective.

Q39. How can building ductility be improved?

Correct Answer: A

Steel reinforcement provides ductility.

Q40. Buildings with irregular geometry are:

Correct Answer: A

Irregular buildings have uneven seismic response.

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