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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A ring (cup) shake in timber is a crack that:
सही उत्तर: ग) Separates the wood partly or wholly along the annual rings
Cup and ring shakes are circumferential separations between annual rings, often due to frost or uneven growth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main function of mortar in masonry is to:
सही उत्तर: क) Bind the units together and distribute loads evenly
Mortar bonds bricks or stones into a single mass, fills joints and spreads loads uniformly.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Gauged mortar is:
सही उत्तर: क) Lime mortar to which cement is added to improve its strength
Gauging lime mortar with cement (cement-lime mortar) increases strength while keeping good workability.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Kankar, found in nodules in some soils, is used for producing:
सही उत्तर: क) Hydraulic lime
Kankar is an impure limestone containing clay; burning it yields hydraulic lime.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Poor (lean) lime contains a high proportion of clay impurities (more than about 30%) and therefore:
सही उत्तर: ख) Slakes and sets very slowly and is used only for inferior work
Poor lime is impure; it slakes and sets slowly, has poor binding properties and is used for low-grade work.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hydrated (slaked) lime is chemically:
सही उत्तर: ग) Calcium hydroxide, Ca(OH)2
Slaking quick lime with water gives calcium hydroxide.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Quick lime is produced by:
सही उत्तर: ग) Calcination (burning) of limestone, driving off carbon dioxide
CaCO3 → CaO + CO2 on heating; the CaO produced is quick lime.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hydraulic limes are classified as feebly, moderately or eminently hydraulic depending on their:
सही उत्तर: क) Clay (impurity) content
The greater the clay content, the more hydraulic the lime and the faster it sets under water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a lightweight aggregate?
सही उत्तर: क) Pumice
Pumice is a natural porous volcanic rock used as lightweight aggregate; expanded clay and cinder are other examples.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The soundness test of aggregates using sodium sulphate or magnesium sulphate solution measures resistance to:
सही उत्तर: क) Weathering (disintegration under alternate wetting and drying or freezing)
Repeated cycles of soaking in sulphate solution and drying simulate weathering; the weight loss indicates soundness.
💬 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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