Materials of Construction Question and Answers on Stones
1. The rocks formed due to solidification of molten mass are called
(a) aqueous rocks
(b) sedimentary rocks
(c) metamorphic rocks
(d) igneous rocks
Answer : d
2. Granite is an example of
(a) aqueous rocks
(b) sedimentary rocks
(c) metamorphic rocks
(d) igneous rocks
Answer : d
3. Solidification of molten magma at the surface of the earth results in the formation of
(a) sedimentary rock
(b) basalt and traps
(c) granite
(d) metamorphic rock
Answer : b
4. Solidification of molten magma within the earth’s crust results in the formation of
(a) sedimentary rock
(b) basalt and trap
(c) granite
(d) metamorphic rack
Answer : c
5. Sedimentary rocks are formed due to
(a) solidification of molten mass
(b) gradual deposition of materials like sand, clay, generally by setting water
(c) alteration of original stones under heat and pressure
(d) none of the above
Answer : b
6. In the options given in question No. 5, identify the process responsible for the formation of metamorphic rocks.
Answer : c
7. Under metamorphism, which of the following changes is correct?
(a) granite changes to gnesis.
(b) trap and basalt change into laterite.
(c) limestones change into marble.
(d) all the above
Answer : d
8. Granite has
(a) crystalline, glossy and fused texture
(b) foliated structure
(c) layers of different compositions
(d) none of the above
Answer : a
9. The principal constituent of argillaceous rock is
(a) sand
(b) lime
(c) clay
(d) all the above
Answer : c
10. Laterite is chemically classified as
(a) calcareous rock
(b) siliceous rock
(c) metamorphic rock
(d) argillaceous rock
Answer : d
11. Which of the following is an example of siliceous rock?
(a) granite
(b) gnesis
(c) quartzite
(d) all the above
Answer : c
12. Marble is an example of
(a) aqueous rock
(b) metamorphic rock
(c) sedimentary rock
(d) igneous rock
Answer : b
13. Slate is used for
(a) building walls
(b) road metal
(c) manufacture of cement
(d) roofing
Answer : d
14. Which one of the following takes polish very well?
(a) basalt and trap
(b) granite
(c) sandstone
(d) quartzite
Answer : b
15. The colour of granite is
(a) grey
(b) green
(c) brown
(d) all of these
Answer : d
16. A fine grained granite
(a) can be polished well
(b) can be used for exterior facing of buildings
(c) offers higher resistance to weathering
(d) all of the above
Answer : d
17. Siliceous sand subjected to metamorphic action is known as
(a) laterite
(b) murram
(c) quartzite
(d) dolomite
Answer : c
18. When quarrying is to be done in hard and compact rocks, the usual method employed is
(a) wedging
(b) using channeling machine
(c) blasting
(d) all of the above
Answer : c
19. Quarrying by using channeling machine is employed for quarrying in
(a) soft rock
(b) hard rock
(c) sandstones
(d) all the above
Answer : a
20. Heating technique of breaking rocks is suitable if the aim is to get
(a) aggregates
(b) slabs
(c) building blocks
(d) none of the above
Answer : a
21. The process of taking out stones of various sizes from natural rock is known as
(a) dressing
(b) seasoning
(c) polishing
(d) quarrying
Answer : d
22. The process of giving required shape and size to stones is known as
(a) dressing
(b) seasoning
(c) polishing
(d) quarrying
Answer : a
23. Boasted finish of dressing stone is
(a) making non-continuous parallel marks
(b) giving finish to a 20 mm margin only at edges
(c) providing continuous lines on the face
(d) working out 30–50 mm wide margin around the face with chisel
Answer : a
24. Dressing of the stone is made
(a) immediately after quarrying
(b) after three months of quarrying
(c) just before using for building works
(d) after seasoning
Answer : a
25. The most powerful explosive used in blasting is
(a) gunpowder
(b) guncotton
(c) dynamite
(d) cordite
Answer : b
26. Moisture absorption of a good stone should be less than
(a) 1%
(b) 5%
(c) 8%
(d) 12%
Answer : b
27. Most of the stones possess the specific gravity in the range of
(a) 1.2 – 1.6
(b) 1.6 – 2.0
(c) 2.4 – 2.8
(d) 3.0 – 4.0
Answer : c
28. Which of the following has the lowest strength?
(a) granite
(b) sandstone
(c) marble
(d) laterite
Answer : d
29. Limestone used for manufacture of cement is
(a) kankar
(b) magnesium limestone
(c) compact limestone
(d) granular limestone
Answer : a
30. Which of the following has the highest crushing strength?
(a) granite
(b) gneiss
(c) basalt
(d) trap
Answer : d
31. Which of the following stone has the highest resistance to fire?
(a) granite
(b) limestone
(c) sandstone
(d) argillaceous material
Answer : d
32. Smith’s test on stone is to check
(a) toughness
(b) hardness
(c) compressive strength
(d) presence of muddy substance
Answer : d
33. Los Angeles testing machine is used to find the following in stone
(a) surface wear
(b) hardness
(c) compressive strength
(d) presence of mud
Answer : a
34. Impact value of stone for road work specified are
(a) wearing coat 30%
(b) bituminous macadam 35%
(c) water bound macadam 40%
(d) all the above
Answer : d
35. Deterioration of stones takes place due to
(a) temperature variation
(b) freezing and thawing
(c) rainwater
(d) all of the above
Answer : d
36. Which one of the following is not a preservative of stone
(a) coal tar
(b) paraffin
(c) linseed oil
(d) ASCU
Answer : d
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