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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PVC, widely used for pipes and window frames, stands for:
सही उत्तर: ख) Polyvinyl chloride
PVC is polyvinyl chloride, a thermoplastic polymer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The minimum percentage elongation of mild steel of grade E250 (Fe 250) is about:
सही उत्तर: क) 23%
Mild steel of grade E250 must show an elongation of about 23%, much higher than high-strength bars.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lead (flint) glass, which contains lead oxide, is used for optical items and radiation shielding windows because it has:
सही उत्तर: घ) High refractive index and high density
Lead oxide raises the refractive index and density, giving brilliance and good absorption of radiation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Annealing of glass during manufacture is done in order to:
सही उत्तर: ग) Relieve internal stresses by slow, controlled cooling
Slow cooling in an annealing lehr removes stresses that would otherwise cause spontaneous cracking.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Structurally, ordinary glass is best described as:
सही उत्तर: ख) An amorphous (non-crystalline) solid, often called a super-cooled liquid
Glass cools from the melt without crystallising, so it has an amorphous structure.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The spreading rate (covering capacity) of a paint is usually expressed in:
सही उत्तर: क) Square metres per litre
Spreading rate is the area covered by one litre of paint per coat, in m²/litre.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Aluminium paint is often used on water tanks, pipes and roofs because it:
सही उत्तर: घ) Reflects heat and light well and resists corrosion
Aluminium flakes form a reflective, moisture-resistant film that reduces heat gain and protects metal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Wrinkling of a paint film is mainly caused by:
सही उत्तर: ग) Applying the paint too thickly, so that the surface dries faster than the paint below
A thick coat skins over on top while the underlying paint is still soft, so the surface film wrinkles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In painting new woodwork, 'knotting' refers to:
सही उत्तर: ख) Covering knots with a sealer such as shellac so that resin does not exude and spoil the paint
Knotting seals resinous knots before priming; stopping is filling holes and cracks with putty.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A brick with bed face dimensions 190 mm × 90 mm fails under a compressive load of 280 kN. Its compressive strength is about:
सही उत्तर: क) 16.4 N/mm²
Strength = load/area = 2,80,000 N / (190 × 90 = 17,100 mm²) ≈ 16.4 N/mm².
💬 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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