आईओई इन्जिनियरिङ प्रवेश (त्रिवि) M.Sc. इन्जिनियरिङ प्रवेश तयारी
आईओई इन्जिनियरिङ प्रवेश (त्रिवि) – M.Sc. इन्जिनियरिङ प्रवेश
IOE M.Sc. Engineering Entrance · IOE Entrance (TU)
३,८४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
BE/B.Arch प्रवेश: 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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Water rises to a height h in a capillary tube. If the tube projecting above the water surface is shorter than h, then water:
सही उत्तर: ग) rises to the top and stays there, its meniscus becoming flatter
Water rises to the top of the tube and the meniscus adjusts its radius of curvature (hR = constant), so there is no overflow.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Eight identical liquid drops combine to form one big drop. The ratio of the total surface area after combining to that before is:
सही उत्तर: ख) 1 : 2
R = 2r (volume conserved); new area 4π(2r)² = 16πr², old area 8 × 4πr² = 32πr², ratio 1 : 2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two identical spherical mercury drops, each of radius r, coalesce to form a single drop. The radius of the new drop is:
सही उत्तर: ख) 2^(1/3) r
Volume is conserved: (4/3)πR³ = 2 × (4/3)πr³, so R = 2^(1/3) r.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Detergents help in washing clothes mainly because they:
सही उत्तर: घ) reduce the surface tension of water
Lowering the surface tension lets water spread and penetrate fine spaces in the fabric, so it wets the dirt better.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Venturimeter, used to measure the rate of flow of a liquid, works on:
सही उत्तर: ख) Bernoulli's principle
At the narrow throat the speed increases and the pressure falls; the pressure difference, via Bernoulli's equation, gives the flow rate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A solid of volume 100 cm³ is completely immersed in water. The loss in its weight is about (g = 10 m/s²):
सही उत्तर: क) 1 N
Upthrust = weight of displaced water = (100 × 10⁻⁶ m³)(1000 kg/m³)(10 m/s²) = 1 N.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Vessels of different shapes but equal base area are filled with water to the same height. The pressure at the base is:
सही उत्तर: ख) the same in all vessels
Hydrostatic pressure P = hρg depends only on the depth, not on the shape of the vessel (hydrostatic paradox).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A wire has Young's modulus 2 × 10¹¹ N/m². The stress required to produce a strain of 0.1% in it is:
सही उत्तर: क) 2 × 10⁸ N/m²
Stress = Y × strain = 2 × 10¹¹ × 0.001 = 2 × 10⁸ N/m².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The modulus of rigidity (shear modulus) is the ratio of:
सही उत्तर: ग) shear stress to shear strain
The modulus of rigidity η = shear (tangential) stress/shear strain.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Steel is said to be more elastic than rubber because:
सही उत्तर: ख) for the same stress, steel shows a much smaller strain
Elasticity is measured by the modulus (stress/strain); steel's Young's modulus is far larger, so it deforms less for the same stress.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।