Bridge Engineering MCQ

Q1. What provides end support for a bridge superstructure?

Correct Answer: B

Abutments provide end support to bridge superstructure.

Q2. The flow area available for free flow of water under a bridge is called:

Correct Answer: A

Linear waterway is the effective flow area.

Q3. Freeboard on a bridge refers to:

Correct Answer: A

Freeboard is the clearance above highest flood level.

Q4. Which foundation is most suitable for bridges in deep water?

Correct Answer: A

Well foundations are used in deep water.

Q5. The term "skew bridge" means:

Correct Answer: A

Skew bridges have abutments/piers at angles other than perpendicular.

Q6. Which part of a bridge connects the bridge to road embankments?

Correct Answer: A

Approach connects road to bridge.

Q7. In bridge design, the span refers to:

Correct Answer: A

Span is distance between supports.

Q8. Wing walls in bridges serve to:

Correct Answer: A

Wing walls prevent soil erosion near abutments.

Q9. The load transmitted from bridge superstructure to substructure is:

Correct Answer: C

Load transfer medium carries loads to substructure.

Q10. The minimum clearance between bridge superstructure and highest flood level is called:

Correct Answer: A

Freeboard ensures safety from flooding.

Q11. The major cause of scour near bridge foundations is:

Correct Answer: A

High velocity flow causes erosion around foundations.

Q12. Which bridge type has load carried mainly by cables?

Correct Answer: A

Suspension bridges use cables for load support.

Q13. Bearing in bridges is used to:

Correct Answer: A

Bearings transmit loads and permit movements.

Q14. Caisson foundation is:

Correct Answer: A

Caissons are used underwater for foundations.

Q15. The dead load of a bridge includes:

Correct Answer: A

The correct answer is A. Weight of bridge structure itself. In structural engineering, the term dead load refers to the permanent and immovable load acting on a bridge throughout its service life. It primarily includes the self-weight of the bridge structure, such as girders, decks, piers, parapets, and other fixed components. These loads remain constant and are considered during the design phase to ensure structural stability and safety. In contrast, vehicle load and live load are variable loads caused by moving traffic or pedestrians, while wind load is an environmental force acting externally on the structure. Hence, the self-weight of the bridge alone is categorized as the dead load of a bridge.

Q16. Which bridge type is constructed by cantilever arms?

Correct Answer: A

Cantilever bridges use projecting beams.

Q17. The structural system of a bridge deck usually includes:

Correct Answer: A

Deck consists of girders and slabs.

Q18. Wind load on bridges is considered as:

Correct Answer: A

Wind imposes lateral forces.

Q19. Which test determines soil permeability near bridge site?

Correct Answer: A

Permeability test measures seepage.

Q20. The component that transfers load from superstructure to substructure is:

Correct Answer: A

Bearings distribute load to substructure.

Q21. In arch bridges, main load transfer mechanism is:

Correct Answer: A

Arches carry loads by compression.

Q22. Structural steel for bridges is usually:

Correct Answer: A

High tensile steel is preferred.

Q23. Which component prevents lateral displacement of bridge decks?

Correct Answer: A

Cross bracing stabilizes lateral movements.

Q24. What is the typical span range for slab bridges?

Correct Answer: A

Slab bridges are suited for short spans.

Q25. Which bridge type has cables directly supporting the bridge deck?

Correct Answer: A

Cable stayed bridges have cables connected directly.

Q26. Caisson sinking is easiest when:

Correct Answer: A

Sandy soils allow easier penetration.

Q27. Which of these affects live load in bridge design?

Correct Answer: A

Live load depends mainly on traffic.

Q28. Freeboard is designed to accommodate:

Correct Answer: A

Freeboard ensures clearance over floods.

Q29. When is a skeletal bridge used?

Correct Answer: A

Skeletal bridges use less material.

Q30. Approach roads in bridges are designed to:

Correct Answer: A

Approach roads connect ground to bridge.

Q31. Which bridge foundation type is most expensive?

Correct Answer: A

Well foundations involve costly underwater work.

Q32. Pier of a bridge serves as:

Correct Answer: A

Piers provide intermediate vertical support.

Q33. Which bridge component transmits loads to foundation?

Correct Answer: A

Substructure transfers load to foundation.

Q34. Cantilever bridges are suitable for:

Correct Answer: A

Cantilever bridges span large distances.

Q35. What is the purpose of expansion joints in bridges?

Correct Answer: A

Expansion joints allow movement due to temperature changes.

Q36. The foundation must be designed to prevent:

Correct Answer: A

Foundation prevents excessive settlement.

Q37. Wing walls provide:

Correct Answer: A

Wing walls retain earth on approaches.

Q38. The clear span of a bridge is:

Correct Answer: A

Clear span excludes support widths.

Q39. Which was NOT traditionally used as building material for bridges?

Correct Answer: D

Plastic is modern, not traditional.

Q40. Suspension bridges use:

Correct Answer: A

Main load supported by cables.

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