Test 8 - Engineering Properties of Building Stones

Question 1 ప్రశ్న 1

Which combination most appropriately describes the requirements of a good natural building stone for general structural use?

A Adequate strength, durability, low detrimental porosity, sound structure and suitability for the intended exposure B High porosity, numerous cracks, low strength and maximum water absorption C Attractive colour alone, irrespective of structural defects D Maximum hardness irrespective of workability, brittleness or service condition

Question 2 ప్రశ్న 2

Which statement correctly distinguishes strength from toughness in a building stone?

A Strength concerns resistance to applied stress, whereas toughness concerns resistance to impact or shock without failure. B Strength and toughness are identical properties and the terms are interchangeable. C Toughness measures only the ability of a stone to take polish. D Strength refers only to resistance against surface scratching.

Question 3 ప్రశ్న 3

A natural stone is required for a heavily trafficked floor where repeated rubbing and abrasive wear are the dominant service actions. Which property deserves particular emphasis during selection?

A Hardness and resistance to abrasion B Plasticity C Solubility in water D Ability to absorb maximum moisture

Question 4 ప్రశ్న 4

Stone blocks are to be used at a location where repeated impact from handling and service loads is more critical than surface rubbing. Which mechanical property is particularly relevant?

A Toughness B Colour C Specific gravity alone D Polishability alone

Question 5 ప్రశ్న 5

Which statement most accurately describes durability of a building stone?

A Its ability to retain satisfactory performance against weathering and other deteriorating influences during service B Its ability to support load during a single laboratory compression test only C Its colour immediately after quarrying D Its ease of cutting irrespective of long-term performance

Question 6 ప్రశ్న 6

Which statement about porosity and water absorption of natural building stone is most technically defensible?

A A more connected pore system can generally permit greater water entry, but absorption depends on accessible pore structure rather than total porosity alone. B Porosity and water absorption are always numerically identical. C A stone with pores necessarily has zero water absorption. D Increasing connected porosity always increases strength.

Question 7 ప్రశ్న 7

A stone specimen has an oven-dry mass of 2.50 kg and a saturated surface-dry mass of 2.56 kg. What is its water absorption by mass?

A 1.2 percent B 2.4 percent C 4.0 percent D 6.0 percent

Question 8 ప్రశ్న 8

A rectangular natural-stone block has a volume of 0.005 m³ and a dry mass of 13.5 kg. What is its bulk density?

A 1350 kg/m³ B 2000 kg/m³ C 2700 kg/m³ D 6750 kg/m³

Question 9 ప్రశ్న 9

A stone has a bulk density of 2700 kg/m³. If its bulk specific gravity is calculated as the ratio of this bulk density to a reference water density of 1000 kg/m³, what is the value?

A 0.27 B 1.70 C 2.70 D 27.0

Question 10 ప్రశ్న 10

The true specific gravity of a stone is 2.75 and its apparent specific gravity is 2.64. Using true porosity = [(true specific gravity − apparent specific gravity) / true specific gravity] × 100, what is the true porosity?

A 2.0 percent B 4.0 percent C 6.4 percent D 11.0 percent

Question 11 ప్రశ్న 11

Match the engineering property of natural building stone with the relevant Indian Standard test framework:
1. Compressive strength
2. True specific gravity
3. Water absorption, apparent specific gravity and porosity
4. Resistance to wear by abrasion

P. IS 1706:2024
Q. IS 1122:2023
R. IS 1121 (Part 1):2023
S. IS 1124:1974

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

Question 12 ప్రశ్న 12

Two stones have similar compressive strength, but Stone X suffers much less surface loss under abrasion than Stone Y. For heavily used stair treads, what is the most appropriate conclusion?

A Stone X is generally the more promising choice because abrasion resistance is directly relevant to the service condition. B Stone Y must be superior because compressive strength alone determines tread wear. C Both stones must perform identically because their compressive strengths are similar. D Abrasion resistance is relevant only to submerged foundations.

Question 13 ప్రశ్న 13

Which statement best expresses the role of workability in selecting a building stone?

A A stone should be capable of being quarried, cut and dressed economically to the required form without unacceptable waste, while still possessing the necessary service properties. B The easiest stone to cut is automatically the strongest and most durable stone. C Workability is irrelevant for ashlar and ornamental stonework. D Maximum hardness is always desirable even if the stone cannot be economically shaped for the intended work.

Question 14 ప్రశ్న 14

When a freshly broken building-stone specimen shows numerous cracks, cavities and patches of soft weathered material, which engineering interpretation is most appropriate?

A The internal structure is defective and the stone should not be accepted for demanding structural work merely on the basis of its rock name. B Such discontinuities are desirable because they always improve strength. C Internal structure has no influence on stone durability. D The defects can be ignored whenever the exterior surface is polished.

Question 15 ప్రశ్న 15

For an exposed architectural facing, which combination is generally desirable in addition to adequate structural and durability properties?

A Pleasing and reasonably uniform appearance, suitable texture and the ability to receive the required finish B Maximum number of weathered patches and colour stains C High absorption solely to darken the surface during rain D Numerous open cracks to improve visual texture

Question 16 ప్రశ్న 16

Which statement about weather resistance of natural building stones is the most accurate?

A It depends on factors such as mineral composition, pore structure, defects and the environmental exposure acting on the stone. B It is determined entirely by colour. C Every stone having high compressive strength is automatically immune to weathering. D Weathering affects only artificial building materials and not natural stone.

Question 17 ప్రశ్న 17

Which statement is most appropriate when assessing a natural stone for construction in a location where severe heating or fire exposure is a design concern?

A Fire performance should be evaluated separately because mineral composition, thermal expansion, moisture and internal structure can affect cracking or spalling under high temperature. B The stone with the highest room-temperature compressive strength is automatically fireproof. C All natural stones behave identically at high temperature. D Water absorption alone completely determines fire resistance.

Question 18 ప్రశ్న 18

A gravity retaining structure requires substantial self-weight as part of its resistance to overturning and sliding. Other required properties being satisfactory, which characteristic of the stone can be advantageous?

A Relatively high bulk density B Maximum open porosity C Very low mass per unit volume D High water absorption

Question 19 ప్రశ్న 19

Thin stone panels are to be used as exterior cladding. Which selection principle is the most appropriate?

A Check strength appropriate to panel action, controlled detrimental absorption, durability, soundness and any directional weakness rather than selecting solely by colour. B Select the most porous stone because thin panels require maximum water entry. C Ignore cracks because cladding is non-structural. D Select solely on specific gravity because all other properties become irrelevant in thin sections.

Question 20 ప్రశ్న 20

Consider the following statements about the engineering properties of good building stones:
1. Low detrimental water absorption is generally desirable for exposed durable construction.
2. Toughness is especially relevant where impact or shock loading occurs.
3. High compressive strength alone proves that a stone is durable under every exposure.
4. Workability can influence the cost of dressing and shaping the stone.

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 21 ప్రశ్న 21

Match the property with its most appropriate engineering significance:
1. Hardness
2. Toughness
3. Durability
4. Workability

P. Resistance to impact and shock
Q. Ease and economy of cutting, dressing and shaping
R. Resistance to scratching, rubbing and abrasive wear
S. Ability to resist long-term deteriorating influences

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

Question 22 ప్రశ్న 22

Two stone samples have equal average compressive strength. Stone A has low water absorption and a compact sound structure, whereas Stone B has substantially higher absorption and several interconnected pores. For a continuously weather-exposed wall, which conclusion is most appropriate?

A Stone A is the more promising durability candidate, although full selection still requires the remaining relevant properties to be checked. B Stone B is automatically superior because higher absorption improves weather resistance. C Both stones must have identical durability because their compressive strengths are equal. D Stone A must be rejected because compact stones cannot be used externally.

Question 23 ప్రశ్న 23

A stone block has a bulk density of 2600 kg/m³ and a volume of 0.012 m³. What is its mass?

A 21.7 kg B 31.2 kg C 43.3 kg D 312 kg

Question 24 ప్రశ్న 24

A decorative ashlar project requires sharply dressed profiles and carved details. Stone X and Stone Y both satisfy the required strength and durability, but X is moderately workable while Y is extremely hard and causes excessive tooling loss and wastage. Which selection is more rational for this specific work?

A Stone X, because adequate workability becomes an important economic and workmanship requirement once strength and durability are already satisfactory. B Stone Y automatically, because the hardest stone is always best for every construction purpose. C Either stone must cost exactly the same to dress. D Stone Y because workability has no relevance to ashlar construction.

Question 25 ప్రశ్న 25

Which statement correctly distinguishes density from specific gravity when evaluating building stones?

A Density is mass per unit volume and has units, whereas specific gravity is a dimensionless ratio relative to the density of water. B Density and specific gravity are always numerically and dimensionally identical. C Specific gravity is measured in kg/m³ while density has no units. D Both properties measure only the colour of the stone.

Answer Key || సమాధానాల పట్టిక

Related Quizzes || సంబంధిత క్విజ్‌లు

Civil HMWSSB, Unit 1 - Building Materials and Construction Quiz

TGPSC HMWSSB Quiz

Answer Key సమాధానాల పట్టిక

Related Quizzes సంబంధిత క్విజ్‌లు