1. Introductory Rocks and Minerals
1.1. Which one of the following construction material is not a constituent of cement concrete?
(a) lime (b) mortar (c) cement (d) stone
1.2. Paints are used in construction as:
(a) cement materials (b) protective materials (c) solid materials (d) liquid materials (e) none of these are correct
1.3. Which one of the following is classied as a solid material
(a) stones (b) bricks (c) iron (d) timber (e) All of these are correct
1.4. To face shortage of conventional building materials, construction engineers are manufacturing building materials which are:
(a) cheap (b) environment friendly (c) energy effcient (d) all of these are correct
1.5. Which one of the following definitions is correct?
(a) The molten or partly rock-materials inside the earth is called magma.
(b) The rocks which get formed by the cooling of magma are called igneous rocks.
(c) both (a) and (b) (d) neither (a) nor (b)
1.6. Pick up the correct statement from the following.
(a) Granite rocks possess extremely grained crystalline structure.
(b) Dolerite rocks possess nely grained crystal line structure.
(c) Basalt rocks extremely ane-grained in structure may frequently contain non-crystalline glass.
(d) All of these are correct.
1.7. Pick up the correct statement from the following:
(a) Granite rocks are formed due to cooling of magma at a considerable depth from the earths surface. (b) Dolerite rocks are formed at a relatively shallow depth from the earths surface due to quick cooling of magma.
(c) Basalt rocks are formed due to pouring of magma on earths surface by very rapid cooling.
(d) All of these are correct.
1.8. Pick up the correct statement from the following.
(a) The portion of the weathered product that remains at the site of its origin, is known as residual deposit.
(b) The insoluble products of weathering carried away in suspension, when they get deposited, are called the sedimentary deposits.
(c) The soluble products of weathering carried away and get deposit by some physio-chemical processes such as evaporation precipitations etc are known as chemical deposit.
(d) The portion of the weathered product when they get deposited through the agency of organisms are called the organic deposits.
(e) All of these are correct.
1.9. Which one of the following rock is not sedimentary rock?
(a) Gravel (b) Sand stone (c) Basalt (d) Gypsum
1.10. Pick up the correct statement from the following:
(a) The metamorphic rocks generally possess foliated structure.
(b) The sedimentary rocks are distinctly stratied.
(c) Both (a) and (c) are correct. (d) Neither (a) nor (b) correct.
1.11. The argil or clay predominates in:
(a) Argillaceous rocks (b) Calcareous rocks (c) Silicious rocks (d) None of these
1.12.Marble belongs to which of the following rocks?
(a) Calcareous rocks (b) Argillaceous rocks (c) Silicious rocks (d) None of these
1.13. Quartz sand is:
(a) Monomineralic rock (b) Polymineralic rock (c) Sedimentary rock (d) Calcareous rock
1.14. Augite (Pyroxene) is a mineral
(a) which contains octagonal crystals.
(b) which changes to chlorite by hydration.
(c) having density between 2.3 to 3.6 g/cm3.
(d) whose hardness lies between 5 to 6
(e) All of these are correct.
1.15. Hornblende is :
(a) a heavy mineral. (b) a durable mineral. (c) not a brittle mineral. (d) a strong mineral.
1.16.Pick up the correct statement from the following:
(a) Mica is silicate of aluminium with potassium.
(b) Muscovite mica is popularly known as white mica.
(c) Biotite mica is popularly known as black mica.
(d) Mica commonly occurs in igneous rocks. (e) All of these are correct.
1.17.Pick up the correct statement from the following:
(a) Quartz is the crystalline form of silica.
(b) Quartz is weather-proof and resists the acid attack with the exception of hydrochloric acid.
(c) Quartz’s transparent crystal is known as rock crystal.
(d) Quartz is a compact translucent mass known as hornstone.
(e) All of these are correct.
1.18.Which one of the following acids does not react chemically?
(a) Sulphuric acid (b) Nitric acid (c) Hydrochloric acid (d) Uric acid
1.19. The mineral calcite:
(a) is a chief constituent of many sedimentary rocks.
(b) is calcium carbonate (CaCO3).
(c) when attacked by mineral acids produces carbon dioxide.
(d) deteriorates in water containing carbon dioxide and forms calcium bicarbonate Ca (HCO3)2.
(e) All of these are correct.
1.20. The Dolomite:
(a) consists of brittle crystals. (b) is not soluble in ordinary water. (c) is stronger and heavier than calcite. (d) All of these are correct.
1.21. Dolomite, a mineral of sedimentary rocks, is:
(a) Bicarbonate of magnesium (MgCO3). (b) Bicarbonate of calcium (CaCO3). (c) Bicarbonates of magnesium and calcium. (d) None of these are correct.
1.22. The percentage contents of magnesium carbonate and calcium carbonate in dolomite minerals are: (a) MgCO3 46% and CaCO3 54% (b) MgCO3 50% and CaCO3 50% (c) MgCO3 54% and CaCO3 46% (d) MgCO3 48% and CaCO3 52%
1.23. Gypsum: (a) is the hydrated sulphate of calcium (CaSO4 . 2H2O). (b) is white in colour in its pure state. (c) has very poor solubility in water. (d) All of these are correct.
1.24. The composite masonry includes: (a) walls of bricks and facing in stones. (b) walls of stones and facing in bricks. (c) both (a) and (b) (d) neither (a) nor (b)
2. STONES AS BUILDING MATERIAL
2.1. The popularity of stones as a building material is decreased due to RCC and steel structure, which have: (a) good strength. (b) durability. (c) suitability to multi-storeyed buildings. (d) All of these are correct.
2.2. Pick up the correct statement from the following: (a) The distinct plane of division in stones along which stone can be easily split, is known as natural bed of the stone. (b) The natural bed of stone indicates the plane in which the sedimentary stone was initially deposited (c) The natural bed of stone lies along the planes of stratication in sedimentary rocks. (d) All of these are correct.
2.3. The maximum strength to stones is obtained by placing the applied load: (a) Perpendicular to the direction of the natural bed of stone. (b) Along the direction of the natural load of stone. (c) Both (a) and (b) sometime, (d) Neither (a) nor (b)
2.4. Pick up the correct statement from the following: (a) In stone arches, the stones are placed with their natural beds radially. (b) The stones are placed in cornices with the direction of natural bed vertical. (c) The stones are placed in walls with the direction of their natural beds horizontal. (d) All of these are correct.
2.5. Pick up the correct statement from the following: (a) The acid test is done with a solution of hydrochloric acid (1% strength) on sand stones to detect the presence of calcium carbonate. (b) Attrition test is carried out to and the rate of wear of stones to be used in road construction. (c) Attrition test of stone is carried out in Devalls attrition machine which contains two cylinders of diameter 20 cm and length 34 cm. (d) All of these are correct.
2.6. To test the compressive strength (crushing strength) of stone, which one of the following steps is/are involved? (a) The sample of stone should be three cubes of side 40 mm, (b) All the three cubes are placed in water for about 72 hours prior to test. (c) The load bearing surface of the cube covered with plaster of Paris or 5 mm thick plywood is placed in a crushing test machine to receive the applied load nally. (d) The rate of loading the crushing machine is kept140 kg/cm2 per minute. (e) All of these are correct.
2.7. Which one of the following is a correct statement? The compressive strength of stone is found out by the. (a) Crushing test (b) Hardness test (c) Impact test (d) Smiths test 2.8. The diameter and height of the test cylinder used for hardness test and impact test: (a) 10 mm (b) 15 mm (c) 20 mm (d) 25 mm
2.9. The smith’s test of stones is performed to and out: (a) The presence of soluble matter. (b) The tensile strength. (c) The presence of lime. (d) None of these are correct.
2.10. It W1 is the actual weight of the cube from the stone sample W2 is the weight of the cube after immersing in distilled water, W3 is the weight of the sample cube in water and W4 to the weight of the sample stone, after keeping in boiling water for 5 hours, then which one of the following statement is correct?
(a) Percentage of absorption by weight after 24 hrs = 2 1 1 100 W W W − × (b) Percentage absorption by volume after 24 hrs 2 1 2 3 100 W W W W − × − (c) Percentage porosity by volume 4 1 2 3 W W W W − × − kg/m3 (d) Specic gravity = 1 2 3 W W W− (e) All of these are correct
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