_______ are the end supports to superstructure of bridge which retain earths on their back side which serves as an approach to the bridge.
- AGirders
- BDeck
- CPier Cap
- DAbutmentsCorrect
Solution
Concept
Abutments are end supports of a bridge that also retain the earth fill of the approach road.
Step-by-step solution
1. The question asks for the end supports of the bridge. 2. These supports also hold back the soil of the approach. 3. This is the work of abutments. 4. Answer: Abutments (D).
Explanation
Abutments are at the two ends of a bridge. They carry the superstructure load and also act as retaining walls for the approach embankment soil.
Why the other options are wrong
A: Girders are main load-carrying members of the superstructure. B: Deck is the surface that carries traffic. C: Pier cap sits on top of a pier, not at the end, and does not retain earth.
Shortcut
End support + retains earth = abutment.
Common mistake
Confusing abutment with pier. A pier is an intermediate support and does not retain earth.
Correct answer: D) Abutments