Rocks MCQ – Building Materials

21. Mafic rocks are a part of

  1. Igneous rocks
  2. Sedimentary rocks
  3. Metamorphic rocks
  4. Fossil rocks
Answer
Answer. a

22. Quartzite is a

  1. argillaceous rock
  2. silicious rock
  3. aqueous rock
  4. calcareous rock
Answer
Answer. b

23. Chemically, marble is ________ rock.

  1. Calcareous
  2. Metamorphic
  3. Argillacious
  4. Silicious
Answer
Answer. a

24. In a core drilled for 100 m, the following fragments were obtained 24 cm, 12, 11, 9, 22, 8, 12 and loose rock. The RQD of the rock is

  1. 81%
  2. 17%
  3. 22%
  4. 2%
Answer
Answer. a

25. Sand stone is

  1. Sedimentary rock
  2. Metamorphic rock
  3. Volcanic rock
  4. Igneous rock
Answer
Answer. a

26. Marble is a

  1. Igneous rock
  2. Sedimentary rock
  3. Metamorphic rock
  4. Granite rock
Answer
Answer. c

27. In which of the following sedimentary rocks, stratification is vague or unnoticeable?

  1. Sandstone
  2. Shale
  3. Coal seams
  4. Limestone
Answer
Answer. d

28. Fossils can occur only in

  1. sedimentary rocks
  2. igneous rocks
  3. metamorphic rocks
  4. gneiss rocks
Answer
Answer. a

29. Based on the rock mass rating (RMR), a rock having a value ranging between 41-60 will be rated as

  1. Very poor
  2. Poor
  3. Good
  4. Fair
  5. Very good
Answer
Answer. d

30. Which of the following is a significant constituent of sedimentary rock?

  1. hematite
  2. magnetite
  3. halite
  4. calcite
Answer
Answer. d

31. Metamorphic rocks are the rocks which are formed

  1. when molten lava (magma) cools and turns to solid rock
  2. when heat and pressure are applied on the rocks
  3. when small pieces of rocks are pressed together over a period of time
  4. due to the gradual erosion of the earth surface few impurities and high lusture.
Answer
Answer. b

32. Stratification can be seen widely in which of the following rocks?

  1. Igneous rocks
  2. Metamorphic rocks
  3. Sedimentary rocks
  4. Fossil rocks
Answer
Answer. c

33. Granite mainly composed of quartz and feldspar particles, is obtained from

  1. Metamorphic rocks
  2. Sedimentary rocks
  3. Volcanic rocks
  4. Igneous rocks
Answer
Answer. d

34. Which of the following represents a metamorphic rock?

  1. slate
  2. shale
  3. quartzite
  1. only iii
  2. both i and iii
  3. both ii and iii
  4. all i, ii and iii
Answer
Answer. b

35. Chemically, how would Kaolin be classified as?

  1. Calcareous rock
  2. Metamorphic rock
  3. Siliceous rock
  4. Argillaceous rock
Answer
Answer. d

36. Laterite is chemically classified as

  1. Calcareous rock
  2. Argillaceous rock
  3. Siliceous rock
  4. Metamorphic rock
Answer
Answer. b

37. The rocks having alumina or clay as their major constituents are known as

  1. Siliceous rocks
  2. Calcareous rocks
  3. Argillaceous rocks
  4. Sedimentary rocks
Answer
Answer. c
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