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 silica (SiO2) content of ordinary Portland cement is typically in the range:
सही उत्तर: ख) 17% to 25%
Typical OPC contains about 60–67% CaO, 17–25% SiO2, 3–8% Al2O3 and 0.5–6% Fe2O3.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Sandstone is a:
सही उत्तर: घ) Sedimentary rock composed mainly of sand grains cemented together
Sandstone is a sedimentary (siliceous) rock formed by cementation of quartz sand grains.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Limestone and marble are classified chemically as:
सही उत्तर: ख) Calcareous rocks
Both consist mainly of calcium carbonate, so they are calcareous rocks.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Rocks in which clay (alumina) is the predominant constituent, such as slate and laterite, are classified chemically as:
सही उत्तर: घ) Argillaceous rocks
Argillaceous rocks have clay or alumina as the main constituent; siliceous rocks are silica-rich and calcareous rocks are lime-rich.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Rocks such as slate and schist, which can be split into thin layers along definite planes developed by metamorphism, are called:
सही उत्तर: क) Foliated rocks
Foliation is a layered structure developed by pressure during metamorphism, as seen in slate and schist.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Rocks that show distinct layers because they were deposited in beds, such as sandstone and limestone, are called:
सही उत्तर: ख) Stratified rocks
Stratified rocks are sedimentary rocks deposited layer by layer, so they split easily along bedding planes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Dynamite, an explosive used in quarrying hard rock, consists mainly of:
सही उत्तर: घ) Nitroglycerine absorbed in a porous material
Dynamite is nitroglycerine absorbed in an absorbent material, making it more stable to handle than liquid nitroglycerine.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a good building stone, water absorption after 24 hours of immersion should generally not exceed about:
सही उत्तर: ग) 5%
Good building stones are dense, and their water absorption is generally less than 5% by weight.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resistance of a stone to wear by rubbing of particles against each other is tested by the:
सही उत्तर: क) Deval attrition test
In the Deval test, stone pieces are rotated in a cylinder and the loss due to attrition indicates resistance to wear.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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'Quarry sap' in a freshly quarried stone refers to:
सही उत्तर: घ) The natural moisture contained in it, which should be removed by seasoning before use
Freshly quarried stone contains moisture (quarry sap); it is seasoned by exposure, usually for several months, before use.
💬 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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