Building Material Questions (BM3)

In this post I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.



  1. Fourth class bricks are?


    1. Under-burnt
    2. Over-burnt
    3. Well-burnt
    4. Air Dried

    View Answer
    Answer: b Forth class bricks are over-burnt bricks and they are used as aggregates in foundation, road etc.

  2. Select the correct statement


    1. Bloating occurs due to excess amount of carbonaceous matter and sulphur in brick-clay.
    2. Blister occurs due to entrapped air in clay voids.
    3. Lamination occurs due to air imprisonment during brick moulding.
    4. Burning cracks occur due to lumps of lime present in brick-clay.

    View Answer
    Answer: a Blisters are spongy swollen mass over the suface of burnt bricks. It occurs due to excess carbonaceous matter and sulphur present in brick-clay.

  3. When rain water falls on a hot brick then the defect forms is called?


    1. Burning cracks
    2. Chuffs
    3. Black core
    4. Spots

    View Answer
    Answer: b The deformation of bricks due to falling of rain water on a hot brick is called chuffs.

  4. What is the ratio of cement and sand to be used to fill the frog of bricks while testing them for their compressive strength?


    1. 1 : 1
    2. 1 : 2
    3. 1 : 3
    4. 1 : 4

    View Answer
    Answer: a Compressive test on bricks is performed as per IS 3495 Part 2 and cement sand ratio is 1 : 1.

  5. IS 1077 clasifies burnt clay bricks on the bases of?


    1. Consturction purpose
    2. Compressive Strength
    3. Size
    4. Defects

    View Answer
    Answer: b IS 1077 classifies bricks on the bases of their compressive strength.

  6. Which brick is used as aggregate in foundation concrete and road works?


    1. First Class
    2. Second Class
    3. Third Class
    4. Fourth Class

    View Answer
    Answer: d Fourth Class bricks are used as aggregate in foundation concrete and roads.






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