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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A wave has a frequency of 500 Hz and a wavelength of 0.68 m. Its speed is:
सही उत्तर: क) 340 m/s
v = fλ = 500 × 0.68 = 340 m/s. This is a typical value for the speed of sound in air.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In which medium does sound travel fastest?
सही उत्तर: घ) Steel
Sound speed depends on elasticity and density; solids like steel have very high elasticity, giving about 5000 m/s or more. Sound cannot travel through vacuum at all.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the amplitude of a simple harmonic oscillator is doubled, its total energy becomes:
सही उत्तर: ख) Four times
Total energy E = ½kA² ∝ A², so doubling A makes E four times. The time period, however, does not depend on amplitude.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In simple harmonic motion, the acceleration of the particle is maximum at:
सही उत्तर: क) The extreme positions
a = −ω²x, which is maximum in magnitude where |x| is maximum, i.e. at the extremes. At the mean position the velocity, not the acceleration, is maximum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to the second law of thermodynamics, it is impossible to:
सही उत्तर: घ) Convert heat completely into work in a cyclic process
The Kelvin–Planck statement says no cyclic engine can convert all absorbed heat into work. Converting work completely into heat (e.g. friction) is easily possible.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The average translational kinetic energy of a gas molecule at absolute temperature T is:
सही उत्तर: ग) (3/2)kT
From kinetic theory, average translational KE = (3/2)kT, independent of the nature of the gas. (1/2)kT is the energy per degree of freedom.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the absolute temperature of an ideal gas is raised from 300 K to 1200 K, its rms speed becomes:
सही उत्तर: ख) Twice
v_rms = √(3RT/M) ∝ √T; T increases 4 times so v_rms increases √4 = 2 times. Four times would be true for the average kinetic energy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The work done by a gas in an isochoric (constant volume) process is:
सही उत्तर: क) Zero
W = ∫P dV and dV = 0, so W = 0; all heat supplied changes the internal energy. nRT ln(V₂/V₁) is the work in an isothermal process.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ratio of specific heats γ = Cp/Cv for a monoatomic ideal gas is:
सही उत्तर: घ) 5/3
For a monoatomic gas Cv = 3R/2 and Cp = 5R/2, giving γ = 5/3. 7/5 is for a diatomic gas.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A process in which no heat enters or leaves the system is called:
सही उत्तर: ग) Adiabatic
In an adiabatic process ΔQ = 0. An isothermal process keeps temperature constant but heat may flow.
💬 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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