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 heart shake in timber is:
सही उत्तर: ग) A crack originating at the pith and extending towards the sapwood, caused by shrinkage of the heartwood
Heart shakes start at the centre of over-mature trees where the heartwood shrinks; star shakes begin from the bark.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A knot in timber that is formed from a dead branch and is loosely held in the surrounding wood is called a:
सही उत्तर: ख) Dead (loose) knot
Dead knots are not firmly attached and may fall out, weakening the timber; live knots are firmly embedded.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The method of sawing logs by making parallel cuts across the whole log, which is the quickest and most economical, is called:
सही उत्तर: क) Plain (ordinary) sawing
Plain or flat sawing produces boards with least labour and waste, though they tend to warp more than quarter-sawn boards.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lime putty is:
सही उत्तर: घ) Slaked lime mixed with water to form a soft paste
Lime putty is a plastic paste of hydrated lime and water used in mortar and plaster.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Limestone is converted to quicklime by heating it in a kiln to a temperature of about:
सही उत्तर: ग) 900°C
Calcium carbonate decomposes into CaO and CO2 at about 900°C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The split brass cylinder (mould) of the Le Chatelier soundness apparatus has an internal diameter and height of:
सही उत्तर: ख) 30 mm and 30 mm
The Le Chatelier mould is 30 mm in diameter and 30 mm high, with two indicator arms attached on either side of the split.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Gunpowder (blasting powder) used in quarrying consists of:
सही उत्तर: क) Potassium nitrate, charcoal and sulphur
Gunpowder is a mixture of saltpetre (potassium nitrate), charcoal and sulphur, roughly 75:15:10.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Moorum, used in road shoulders and subgrades, is:
सही उत्तर: घ) A gravelly material formed by weathering and disintegration of rock
Moorum is a naturally occurring disintegrated rock material, usually red or brown, used for low-cost road works.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Stone masonry built with finely dressed stones of regular shape laid in fine mortar joints is called:
सही उत्तर: ग) Ashlar masonry
Ashlar masonry uses accurately dressed blocks with thin joints; rubble masonry uses roughly shaped stones.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Silica bricks and magnesite bricks are examples respectively of:
सही उत्तर: ख) Acid refractory and basic refractory bricks
Silica bricks resist acidic slags (acid refractory); magnesite bricks resist basic slags (basic refractory).
💬 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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