Building Material Questions (BM1)

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



  1. Rock formed by solidification of lava is known as?


    1. Volcanic Igneous Rock
    2. Plutonic Igneous Rock
    3. Sedimentary Rock
    4. Metamorphic Rock

    View Answer
    Answer: d Volcanic Igneous Rock

  2. Igneous rocks are classified as?


    1. Volcanic Igneous Rocks
    2. Plutonic Igneous Rock
    3. Both a and b
    4. Neither a nor b

    View Answer
    Answer: c Igneous rocks are classified as Intrusive or Plutonic and Extrusive or Volcanic rocks.
    Example - Granite is an Intrusive Rock and Basalt and Trap are Extrusive rocks.

  3. Which of the following rock is the parent rock of marble?


    1. Granite
    2. Limestone
    3. Sandstone
    4. Basalt

    View Answer
    Answer: b Limestone (sedimentary rock) is the parent rock of Marble (Metamorphic Rock)

  4. Which rocks are called Foliated Rocks?


    1. Rocks which can be split up into thin sheets
    2. Rocks which show distinct signs of layers
    3. Rocks which do not show distinct signs of layers
    4. Rocks which cannot be split up into thin sheets

    View Answer
    Answer: a The rocks which can be split up into thin sheets are known as foliated rocks.
    Example - Slate, Schist etc.

  5. How the stones having bedding plane should be placed?


    1. Normal to the bedding plane
    2. At any angle
    3. Parallel to the bedding plane
    4. $45^\circ$ to the bedding plane

    View Answer
    Answer: a Stones having bedding planes should be placed in a structure such that direction of pressure or load line should be normal to the bedding plane.

  6. A good building stone should have a compressive strength, not less than?


    1. $50 \text{ }N/mm^2$
    2. $80 \text{ }N/mm^2$
    3. $100 \text{ }N/mm^2$
    4. $150 \text{ }N/mm^2$

    View Answer
    Answer: c $100 \text{ }N/mm^2$

  7. What is the range of hardness coefficient of good building stones?


    1. 14 to 16
    2. 14 to 17
    3. 14 to 18
    4. 14 to 20

    View Answer
    Answer: b Hardness coefficient should be between 14 and 17. A value higher than 17 is preferred in Road construction.

  8. When a stone is considered as weak and tough?


    1. toughness index is less than 13 and more than 19 respectively
    2. toughness index is more than 13 and less than 19 respectively
    3. toughness index is less than 10 and more than 20 respectively
    4. toughness index is more than 10 and less than 20 respectively

    View Answer
    Answer: a When the value of toughness index is less than 13, a stone is considered as weak and a value more than 19 indicates tough stone.

  9. Stones are rejected when the moisture content is?


    1. less than 5 %
    2. more than 10 %
    3. less than 10 %
    4. more than 5 %

    View Answer
    Answer: b more than 10 %

  10. Generally, Specific Gravity of good building stones varies between?


    1. 2.0 to 2.5
    2. 2.1 to 2.6
    3. 2.3 to 2.7
    4. 2.4 to 2.8

    View Answer
    Answer: d 2.4 to 2.8

  11. Smith Test on stones is performed to find?


    1. clay content
    2. water content
    3. lime content
    4. all of the above

    View Answer
    Answer: a Clay content in Stones

  12. What is quarry sap?


    1. natural moisture found in quarried stone after some time
    2. natural moisture found in freshly quarried stone
    3. natural moisture found in quarried stone a long time
    4. none of the above

    View Answer
    Answer: b The natural moisture found in freshly quarried stone is known as quarry sap.

  13. Which stone has the highest specific gravity?


    1. Basalt
    2. Granite
    3. Slate
    4. Marble

    View Answer
    Answer: a Basalt and Trap have the highest specific gravity in the range of 2.9 to 2.96.

  14. Which Stone is used in the construction of piers and abutments of bridges?


    1. Marble
    2. Gneiss
    3. Sandstone
    4. Granite

    View Answer
    Answer: d Granite

  15. Limestone can resist temperature up to?


    1. $500^\circ C$
    2. $300^\circ C$
    3. $900^\circ C$
    4. $1000^\circ C$

    View Answer
    Answer: c $900^\circ C$

  16. Which stone can be used as Damp Proofing Course (DPC)?


    1. Slate
    2. Trap
    3. Quartize
    4. Granite

    View Answer
    Answer: a Slate

  17. Which stone is the softest?


    1. Slate
    2. Trap
    3. Talc
    4. Granite

    View Answer
    Answer: c Talc

  18. Which solution is used for durability test of stones?


    1. Sodium Thiosulfate Pentahydrate
    2. Sodium Carbonate Decahydrate
    3. Sodium Hydrogen Carbonate
    4. Sodium Sulphate Decahydrate

    View Answer
    Answer: d As per IS 1126 Sodium Sulphate Decahydrate is used for durability test of stones.

  19. Which of the following stone is best for fire resistance building?


    1. Compact Sandstone
    2. Limestone
    3. Granite
    4. Qaurtize

    View Answer
    Answer: a Compact sandstone can resist high temperature and its minerals have equal coefficient of expansion.

  20. Which of the following stone is least porous?


    1. Granite
    2. Basalt
    3. Limestone
    4. Quartize

    View Answer
    Answer: b The porosity of basalt is less than 0.5 % and that of granite, limestone and quartize is less than 1 %, less than 4 % and less than 4 % respectively.





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