सिभिल इन्जिनियरिङ
सिभिल इन्जिनियरिङ
Civil Engineering · ५,१७१ प्रश्न
५,१७१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
सिभिल इन्जिनियरिङ: 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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Guniting (shotcrete) is a process in which:
सही उत्तर: क) Cement mortar or concrete is sprayed pneumatically at high velocity onto a surface
Gunite/shotcrete is projected by compressed air, commonly used for tunnel lining, slope protection and repairs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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No-fines concrete is made by omitting:
सही उत्तर: क) Fine aggregate (sand)
No-fines concrete contains cement, water and single-sized coarse aggregate only, producing light, porous concrete.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Self-compacting concrete is concrete that:
सही उत्तर: ग) Flows and consolidates under its own weight without vibration
Self-compacting concrete is highly fluid yet cohesive, filling formwork and congested reinforcement without vibration.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Carbonation of concrete is harmful to reinforced concrete because it:
सही उत्तर: ग) Reduces the alkalinity of concrete, so steel loses protection and may corrode
Carbon dioxide reacts with calcium hydroxide forming calcium carbonate, lowering the pH and depassivating the steel.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Plastic shrinkage cracks in fresh concrete are mainly caused by:
सही उत्तर: ख) Rapid evaporation of water from the surface before the concrete sets
When surface water evaporates faster than bleeding replaces it, the surface shrinks while plastic and cracks.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ultrasonic pulse velocity test on concrete is mainly used to assess:
सही उत्तर: ख) Uniformity and quality, and to detect cracks or voids
Higher pulse velocity indicates dense, good quality concrete; lower velocity indicates cracks, voids or poor compaction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The rebound hammer (Schmidt hammer) is a non-destructive test that estimates concrete strength from its:
सही उत्तर: क) Surface hardness
The rebound of a spring-driven mass depends on the surface hardness, which correlates with compressive strength.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the split tensile test of a concrete cylinder of diameter D and length L failing at load P, the tensile strength is:
सही उत्तर: क) 2P / (πDL)
The splitting (Brazilian) test gives tensile strength = 2P/(πDL).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The compaction factor of fresh concrete is defined as the ratio of:
सही उत्तर: ग) Weight of partially compacted concrete to weight of fully compacted concrete
Compaction factor = weight of partially compacted concrete ÷ weight of fully compacted concrete in the same cylinder, a value less than 1.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the slump test, if one half of the concrete cone slides down along an inclined plane, the slump is called:
सही उत्तर: घ) Shear slump
A shear slump shows lack of cohesion; a true slump subsides evenly, and a collapse slump indicates a very wet mix.
💬 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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