Types of Bricks and Concrete Blocks
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Questions and Answers

What is the typical size difference between a concrete block and the space it occupies to allow for mortar joints?

  • 1/2 in (12.7 mm)
  • 3/8 in (9.5 mm) (correct)
  • 1 in (25.4 mm)
  • 1/4 in (6.4 mm)

    • Which type of brick is mainly used in the construction of flats where large quantities of the product are used?

  • Fourth class bricks
  • Third class bricks
  • First class bricks
  • Second class bricks (correct)

    • What is the maximum percentage of water absorption allowed for third class bricks after 24 hours of immersion in cold water?

  • 15% of their own dry weight
  • 20% of their own dry weight
  • 25% of their own dry weight (correct)
  • 30% of their own dry weight

    • Which type of bond is not mentioned in the text?

    <p>Rustic bond</p> Signup and view all the answers

    What is the primary use of fourth class bricks?

    <p>Road metal and as aggregates in foundation concrete</p> Signup and view all the answers

    What is the characteristic of first class bricks?

    <p>They are the best quality of bricks</p> Signup and view all the answers

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