आईओई इन्जिनियरिङ प्रवेश (त्रिवि) BE / B.Arch प्रवेश परीक्षा तयारी
आईओई इन्जिनियरिङ प्रवेश (त्रिवि) – BE / B.Arch प्रवेश परीक्षा
IOE BE / B.Arch 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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Sound travels fastest in:
सही उत्तर: घ) steel
Sound speed v = √(E/ρ) is largest in solids such as steel (about 5000 m/s); it cannot travel in vacuum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The solar constant (solar power received per unit area at the Earth's mean distance, outside the atmosphere) is about:
सही उत्तर: ग) 1.4 kW/m²
The solar constant is about 1.36 kW/m², i.e. roughly 1.4 kW per square metre.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A metal rod 1 m long (α = 1.2 × 10⁻⁵ K⁻¹) is heated through 100 K. Its increase in length is:
सही उत्तर: ख) 1.2 mm
ΔL = αLΔT = 1.2 × 10⁻⁵ × 1 × 100 = 1.2 × 10⁻³ m = 1.2 mm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The molar specific heat at constant volume of a monatomic ideal gas is:
सही उत्तर: क) 3R/2
A monatomic gas has 3 translational degrees of freedom, U = (3/2)RT per mole, so C_v = 3R/2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to the kinetic theory, the pressure exerted by an ideal gas of density ρ and rms speed v_rms is:
सही उत्तर: घ) (1/3)ρv_rms²
From kinetic theory P = (1/3)ρv_rms².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a reversible adiabatic process of an ideal gas, which of the following remains constant?
सही उत्तर: ग) TV^(γ − 1)
Combining PV^γ = constant with PV = nRT gives TV^(γ − 1) = constant.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A heat engine absorbs 1000 J from the source and rejects 600 J to the sink per cycle. Its efficiency is:
सही उत्तर: ख) 40%
η = W/Q₁ = (1000 − 600)/1000 = 0.4 = 40%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When an ideal gas undergoes free expansion into a vacuum in an insulated container, its temperature:
सही उत्तर: क) remains unchanged
In free expansion Q = 0 and W = 0, so ΔU = 0; for an ideal gas U depends only on T, so T is unchanged.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In an isochoric (constant volume) process, the work done by the gas is:
सही उत्तर: घ) zero
W = ∫P dV and dV = 0, so no work is done; all heat supplied changes the internal energy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Kirchhoff's law of thermal radiation, at a given temperature:
सही उत्तर: ग) good absorbers are good emitters
The ratio of emissive power to absorptive power is the same for all bodies at a given temperature, so good absorbers are good emitters.
💬 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।