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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Fineness modulus of an aggregate is calculated as:
सही उत्तर: घ) Sum of cumulative percentages retained on the standard sieves divided by 100
FM = (sum of cumulative % retained on the standard sieve series) ÷ 100.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The fineness modulus of fine aggregate suitable for most concrete works lies roughly between:
सही उत्तर: ग) 2.2 and 3.2
Medium sand used in concrete typically has fineness modulus about 2.2–3.2; coarse aggregate values are around 5.5–8.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bulking of sand is maximum at a moisture content of about:
सही उत्तर: क) 4% to 6%
Bulking peaks (up to 20–40%) at about 4–6% moisture; fully saturated sand shows virtually no bulking.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A hard burnt clay product, glazed or unglazed, used for ornamental work in buildings is called:
सही उत्तर: क) Terracotta
Terracotta is a fine burnt clay product used for decorative and ornamental elements.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The unit weight of plain cement concrete commonly used in design is about:
सही उत्तर: ग) 24 kN/m³
Plain concrete weighs about 24 kN/m³ (reinforced concrete about 25 kN/m³); 78.5 kN/m³ is steel.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hydraulic lime differs from fat lime in that it:
सही उत्तर: घ) Contains clay impurities and can set under water
Hydraulic lime contains clay (silica, alumina) that lets it set by hydration even under water; fat lime is pure and slakes vigorously.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Fat lime sets and hardens mainly by:
सही उत्तर: ग) Absorbing carbon dioxide from the air
Fat lime is non-hydraulic; it hardens slowly by carbonation, absorbing CO2 from the atmosphere.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An aggregate in which one or more intermediate size fractions are absent is called:
सही उत्तर: घ) Gap graded aggregate
Gap grading omits certain intermediate sizes between fine and coarse fractions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A well-graded aggregate is desirable in concrete because it:
सही उत्तर: क) Has fewer voids and needs less cement paste
Well-graded aggregates pack densely, reducing voids and therefore cement paste requirement.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cement stored for a long time in humid conditions loses strength mainly because:
सही उत्तर: ख) It absorbs moisture and partially hydrates (forms lumps)
Cement is hygroscopic; moisture causes partial hydration (lumps), so stored cement loses strength with time.
💬 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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