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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As per IS 1786, the minimum percentage elongation required for Fe 415 bars is:
सही उत्तर: ख) 14.5%
IS 1786 specifies minimum elongation of 14.5% for Fe 415 and 12% for Fe 500.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ribbed (deformed) reinforcement bars are preferred over plain round bars mainly because they give:
सही उत्तर: ख) Better bond with concrete
The ribs mechanically interlock with concrete, greatly increasing bond strength and reducing the anchorage length needed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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High carbon steel is most suitable for:
सही उत्तर: घ) Cutting tools, springs and drills
High carbon steel (about 0.6–1.5% C) can be hardened to a high degree, which suits tools and springs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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As the carbon content of plain steel increases, its:
सही उत्तर: क) Hardness and strength increase but ductility decreases
More carbon makes steel harder and stronger but less ductile and less weldable.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The LD (basic oxygen) process of steel making involves:
सही उत्तर: ख) Blowing pure oxygen onto molten pig iron in a converter
In the Linz-Donawitz process, high-purity oxygen is blown onto the molten charge, burning out carbon and impurities quickly.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The product obtained from a blast furnace by smelting iron ore with coke and limestone is:
सही उत्तर: घ) Pig iron
The blast furnace produces pig iron (with about 3–4% carbon), which is then refined into cast iron, wrought iron or steel.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The moisture content of timber at site is quickly measured using a:
सही उत्तर: ख) Moisture meter based on electrical resistance
Electrical moisture meters estimate moisture content from the resistance between two pins driven into the wood.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Sissoo, a dense and durable timber widely used for furniture in the Terai of Nepal, has the botanical name:
सही उत्तर: घ) Dalbergia sissoo
Sissoo is Dalbergia sissoo; Shorea robusta is sal, Tectona grandis is teak and Pinus roxburghii is chir pine.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A chemical commonly used for anti-termite treatment of soil under building foundations is:
सही उत्तर: ग) Chlorpyrifos
Soil under and around foundations is treated with termiticides such as chlorpyrifos emulsion to form a chemical barrier.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Burnett's process of timber preservation uses a solution of:
सही उत्तर: क) Zinc chloride
Burnett's process impregnates timber with zinc chloride solution, which is toxic to fungi and insects.
💬 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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