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In concrete masonry, a hollow concrete block has core-void area greater than __________ of the gross area.

(a) 20%

(b) 15%

(c) 30%

(d) 25%

I had been asked this question in exam.

The above asked question is from Stone Composite Masonry topic in division Composite Masonry of Construction & Building Materials

1 Answer

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Correct answer is (d) 25%

The explanation is: Concrete masonry uses two types of cement concrete blocks for the construction of walls – hollow concrete block and solid concrete block. A hollow concrete block has core-void area greater than 25% of the gross area.

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