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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?
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?
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?
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?
Which type of bond is not mentioned in the text?
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What is the primary use of fourth class bricks?
What is the primary use of fourth class bricks?
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What is the characteristic of first class bricks?
What is the characteristic of first class bricks?
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