Test 7 - Common Building Stones and Their Uses

Question 1 ప్రశ్న 1

A bridge pier and adjoining river-training wall require a natural stone having high compressive strength, good durability and strong resistance to wear. Which commonly used building stone is the most appropriate primary choice among the following?

A Granite B Slate C Soft porous sandstone D Laterite of unverified quality

Question 2 ప్రశ్న 2

A prestigious interior lobby requires a natural stone for wall lining and flooring that can develop a smooth, attractive polished surface. Which stone is most characteristically associated with this requirement?

A Marble B Laterite C Soft shale D Unprocessed rubble basalt

Question 3 ప్రశ్న 3

Which property makes a sound slate particularly suitable for traditional roofing tiles?

A Ability to split into thin, durable sheets along slaty cleavage B Extremely high plasticity when wet C Ability to melt at normal roof temperatures D Complete absence of any planar structure

Question 4 ప్రశ్న 4

A highway engineer requires a hard, tough natural rock for producing road metal and coarse aggregate. Which stone is commonly selected for such service because sound varieties are dense and resistant to mechanical wear?

A Basalt or trap B Chalk C Very soft limestone D Weathered laterite soil

Question 5 ప్రశ్న 5

A quarry supplies a compact, well-cemented sandstone with sound bedding and good weathering resistance. For which application is such material particularly suitable?

A Ashlar masonry and architectural stonework B Manufacture of flexible steel reinforcement C Electrical wiring insulation D Replacement of bitumen in pavement surfacing

Question 6 ప్రశ్న 6

Which statement about limestone as a building stone is the most technically defensible?

A Suitable varieties are used for slabs, flooring, paving and building work, but performance varies considerably with composition, texture and porosity. B Every limestone has identical strength and durability irrespective of source. C Limestone is always more resistant to acidic exposure than quartzite. D Limestone cannot be used as dimension stone.

Question 7 ప్రశ్న 7

For an industrial location where the exposed stone may repeatedly encounter acidic liquids, which stone would generally be the more defensible choice from the following, assuming all candidates are otherwise sound?

A Quartzite B Marble C Calcitic limestone D Soft chalk

Question 8 ప్రశ్న 8

Which combination best describes a major engineering advantage and a practical limitation of sound quartzite?

A High hardness and abrasion resistance, but comparatively difficult dressing B Very low hardness, but exceptional ease of polishing into marble-like slabs C High plasticity when wet, but large drying shrinkage D Easy splitting into roofing sheets, but negligible resistance to wear

Question 9 ప్రశ్న 9

A contractor proposes locally quarried laterite blocks for masonry merely because laterite is widely used in some regions. What is the most appropriate engineering response?

A Accept automatically because every laterite deposit has identical properties. B Verify that the particular blocks satisfy the required strength, absorption, durability, dimensions and applicable specification before use. C Reject automatically because laterite can never be used for masonry. D Accept solely on the basis of reddish-brown colour.

Question 10 ప్రశ్న 10

A strongly banded gneiss is proposed for cut stone units. Which consideration is particularly important before deciding how the stone should be oriented in service?

A The direction of foliation or banding and its effect on splitting and strength B Whether the stone becomes sedimentary after cutting C Whether the stone loses all minerals during dressing D Whether its colour exactly matches basalt

Question 11 ప్రశ్న 11

Match each stone with the application most characteristically associated with a suitable sound variety:
1. Granite
2. Slate
3. Marble
4. Basalt

P. Roofing tiles formed from thin split sheets
Q. Polished decorative flooring and wall lining
R. Massive structural and monumental work
S. Road metal and coarse aggregate

A 1-R, 2-P, 3-Q, 4-S B 1-S, 2-Q, 3-P, 4-R C 1-Q, 2-R, 3-S, 4-P D 1-P, 2-S, 3-R, 4-Q

Question 12 ప్రశ్న 12

Match the building stone with the characteristic most relevant to engineering selection:
1. Sandstone
2. Quartzite
3. Marble
4. Gneiss

P. Suitability depends strongly on grain cementation, porosity and bedding
Q. Very hard siliceous stone with strong abrasion resistance
R. Recrystallized carbonate stone capable of taking good polish
S. Foliated or banded metamorphic fabric may cause directional behaviour

A 1-P, 2-Q, 3-R, 4-S B 1-Q, 2-P, 3-S, 4-R C 1-R, 2-S, 3-P, 4-Q D 1-S, 2-R, 3-Q, 4-P

Question 13 ప్రశ్న 13

Consider the following statements:
1. Granite may be used for both structural and ornamental purposes.
2. Suitable slate is used for roofing as well as flooring or cladding.
3. Marble is used only as structural rubble and cannot take a polish.
4. Sound basalt may be used for aggregate and road works.

Which statements are correct?

A 1 and 2 only B 1, 2 and 4 only C 2, 3 and 4 only D 1, 2, 3 and 4

Question 14 ప్రశ్న 14

Why should sandstone used in load-bearing masonry generally be laid with proper regard to its natural bedding?

A Because its strength and splitting behaviour may differ with direction relative to the bedding planes B Because bedding changes sandstone into granite when loaded C Because mortar chemically removes all bedding planes D Because every sandstone has identical properties in every direction

Question 15 ప్రశ్న 15

A specification requires an exterior monumental stone that must withstand substantial abrasion while also retaining a polished finish. Which choice is the most appropriate among the following when a suitable fine-grained variety is available?

A Granite B Soft chalk C Weak porous laterite D Friable sandstone

Question 16 ప్రశ్న 16

An architect must choose between marble and quartzite for two different locations: a highly polished interior decorative wall and a heavily abraded exterior pavement. Which allocation is the most rational?

A Marble for the decorative wall and sound quartzite for the high-abrasion pavement B Quartzite for the decorative wall only because marble cannot be polished C Marble for both because carbonate stones are always harder than quartz D Neither stone can be used in construction

Question 17 ప్రశ్న 17

A roofing slate contains appreciable iron-sulphide inclusions that are expected to weather at the exposed surface. Why is this undesirable?

A Such inclusions can contribute to staining and deterioration during weather exposure. B They guarantee that the slate will become transparent. C They increase the roof slope automatically. D They convert slate into marble.

Question 18 ప్రశ్న 18

Which statement best distinguishes granite from marble for engineering selection?

A Granite is generally a hard igneous stone suited to heavy structural and abrasion-resistant work, whereas marble is a metamorphic carbonate stone particularly valued for polish and decorative use. B Granite and marble are the same rock with different commercial names. C Marble is always stronger and more abrasion resistant than every granite. D Granite cannot be used decoratively because it cannot be polished.

Question 19 ప్రశ్న 19

A quarry offers two sandstones for exterior cladding. Stone X is dense and well cemented, while Stone Y is highly porous and friable with weak clay-rich cement. Which conclusion is most appropriate?

A Stone X is the more promising candidate, while Stone Y requires rejection or strong technical justification because the common name 'sandstone' alone does not guarantee suitability. B Both stones must perform identically because they have the same geological name. C Stone Y is necessarily superior because higher porosity always increases durability. D Cementing material has no influence on sandstone behaviour.

Question 20 ప్రశ్న 20

Which requirement is most appropriate when selecting natural stone for structural masonry, irrespective of whether the specified type is granite, trap, limestone, sandstone or quartzite?

A The stone should be sound, durable and free from defects such as harmful cracks, cavities, weathered patches and weak veins that impair performance. B Any stone is acceptable if its colour is attractive. C Visible cracks are desirable because they make dressing easier. D The stone need not be inspected if its geological name is known.

Question 21 ప్రశ్న 21

A block of otherwise strong granite contains a continuous weathered seam passing completely through the stone. What is the best engineering judgement for a heavily loaded masonry unit?

A Reject or appropriately trim the defective portion because the weak seam may control failure despite the strength of the fresh granite. B Accept automatically because the average properties of granite override every local defect. C Increase the load because weathering always strengthens granite. D Ignore the seam if the stone has an attractive colour.

Question 22 ప్రశ్న 22

For a water-exposed retaining or hydraulic structure, why is it insufficient to select a stone solely because it has high dry compressive strength?

A Durability, water absorption, weathering resistance, defects and the behaviour of joints and bedding must also be considered. B Dry compressive strength has no relevance whatsoever to stone construction. C Only colour determines performance in wet service. D All rocks become equally durable when submerged.

Question 23 ప్రశ్న 23

Which statement about basalt or trap and granite is most accurate for construction-material selection?

A Both can provide strong durable stone, but sound basalt is especially common in aggregate and road applications, while granite is widely used in both massive structural and polished ornamental work. B Basalt is always sedimentary and granite is always metamorphic. C Granite cannot be used as aggregate because it is crystalline. D Basalt must always be easier to dress than sandstone.

Question 24 ప్రశ్న 24

Consider the following statements about common building stones:
1. The suitability of limestone varies with its texture, porosity and composition.
2. The suitability of sandstone varies with its grains, cementing material and bedding.
3. Every granite quarry produces stone of identical engineering quality.
4. Soundness and absence of harmful defects should be checked even for a rock type generally considered durable.

Which statements are correct?

A 1 and 2 only B 1, 2 and 4 only C 2, 3 and 4 only D 1, 2, 3 and 4

Question 25 ప్రశ్న 25

A project requires thin natural-stone units for a sloping roof, polished decorative slabs for an entrance hall, and tough aggregate for a heavily trafficked pavement. Which allocation is the most appropriate?

A Slate for the roof, marble for the polished hall slabs, and sound basalt for the pavement aggregate B Marble for the roof, laterite for the polished slabs, and slate for the pavement aggregate C Basalt for thin split roofing tiles, chalk for polished slabs, and marble powder alone for coarse aggregate D Laterite for every application because one stone type should always be used throughout a project

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