निर्माण सामग्री – Construction Materials MCQ
निर्माण सामग्री – सिभिल इन्जिनियरिङ
Construction Materials · Civil Engineering · १,००८ प्रश्न
१,००८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
निर्माण सामग्री: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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The specific gravity of most good building stones lies roughly in the range:
सही उत्तर: ग) 2.4 to 2.8
Good building stones have specific gravity of about 2.4–2.8; heavier stones are generally more compact and durable.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which rock is most suitable for railway ballast and road metal because of its toughness?
सही उत्तर: घ) Basalt (trap)
Basalt/trap is hard, tough and durable, making it ideal for ballast and road aggregates.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Brard's test on stone is carried out to determine its:
सही उत्तर: क) Resistance to frost (crystallisation)
Brard's test uses sodium sulphate crystallisation to simulate frost action and assess stone durability.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The hardness of stone used in road surfaces is tested by:
सही उत्तर: क) Dorry's abrasion test
Dorry's test measures abrasion hardness of stone; Brard's test checks frost resistance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Acid test on building stone (using dilute HCl) is used to check:
सही उत्तर: ग) Presence of calcium carbonate, indicating weathering resistance in polluted air
Effervescence with acid indicates calcium carbonate; such stones weather poorly in industrial (acidic) atmospheres.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Smith's test on building stone is performed to determine:
सही उत्तर: ग) Presence of soluble earthy matter
In Smith's test, stone chips are shaken in water; if water becomes muddy, the stone contains soluble earthy matter.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of taking out stones from natural rock beds is called:
सही उत्तर: ख) Quarrying
Quarrying is extracting stone from rock exposures; dressing is shaping it afterwards.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When placing stone in masonry, the natural bed of a sedimentary stone should be:
सही उत्तर: क) Perpendicular to the direction of the pressure (load)
Stones are strongest when loaded perpendicular to their natural bedding planes, so the bed is laid horizontal under vertical loads.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Based on chemical composition, granite is classified as a:
सही उत्तर: क) Siliceous rock
Granite has silica as its main constituent, so it is siliceous; limestone and marble are calcareous, slate is argillaceous.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Quartzite is the metamorphic form of:
सही उत्तर: घ) Sandstone
Sandstone, under heat and pressure, becomes very hard quartzite.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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