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<p><strong><a>A.</a> are suitable for works under sea water </strong></p> <p><strong><a>B.</a> resist shocks or vibrations </strong></p> <p><strong><a>C.</a> are suitable for use as batter piles </strong></p> <p><strong><a>D.</a> are useful for heavy vertical loads.</strong></p> <p> </p>
I know a lot of different types of cast iron piles. The different types you can use for all of the above. With certain extras. But the big advantage is that they can take more then just vertical loads.
I believe you are looking for answer D , however Mr. Wolf Klaas Kinsbergen has a good point it has more application abilities than for vertical loads
D. are useful for heavy vertical loads.
I believe the answer is choice "D" are useful for heavy vertical loads.
As given answers, I'll go with choice D
Cast Iron Piles prefer to manufacture with a big circumference cross - sections owing to increase of touch area with the soil so this leads to earn extra strength of the loads
