A ______ caisson is open at top and closed at bottom. A. Wells

a-caisson-is-open-at-top-and-closed-at-bottom-a-wells

A ______ caisson is open at top and closed at bottom.

A. Wells

B. Pneumatic caissons

C. Cylinders

D. Box caissons

I have been asked this question in an internship interview.

Query is from Classification of Caissons in chapter Deep Excavations, Pile Foundations and Caisson of Construction & Building Materials

Right choice is D. Box caissons

For explanation: Box Caisson is merely a variation of the Suspended type cofferdam. The box caissons may be built of reinforced concrete, steel or timber. Condition for box caisson is that the depth of water is about 6 meters to 8 meters.