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MCQs: A thorough knowledge of the mechanism is necessary for the estimate of convective heat transfer coefficient so that the process can be adequately represented by mathematical equation. This is a limitation of the method of
Category: Mechanical Engineering Questions, Published by: teswesm
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MCQs: What is/are the limitation/s of dimensional analysis for estimation of convection heat transfer coefficient?
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MCQs: What is the black body or an ideal radiator?
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MCQs: As a radiator, the black body emits the maximum possible thermal radiation
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MCQs: Which of the following sentences are correct for black body (1) The black body is a hypothetical body (2) The black body is a real body (3) The black body is used as a standard of perfection against which the radiation characteristics of other bodies are compared
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MCQs: What is the relation between emissive power of a real body (E) and emissive power of black body (Eb) when both are at same temperature? Where, α =absorptivity
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MCQs: The emissivity (ε) can be defined as the ratio of
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MCQs: What does the Kirchoff's identity state?
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MCQs: Stefan-Boltzmann law states that the energy radiated per unit area per unit time by the black body is
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MCQs: Which among the following sentences are correct for Stefan-Boltzmann law? (1) The Stefan-Boltzmann law gives the total emissive power of a black body. (2) The Stefan-Boltzmann law is based on quantum theory (3) The Stefan-Boltzmann law does not provide distribution of energy among different wavelengths
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MCQs: The relation derived for the total emissive power of the black body as a function of wavelength and based of quantum theory is known as
Category: Mechanical Engineering Questions, Published by: teswesm
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MCQs: Which of the following is/are example/s of pool boiling?
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MCQs: In pool boiling, as soon as the temperature of heating surface reaches the boiling point of the liquid, heat transfer takes place
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MCQs: In pool boiling process, the region after the natural convection in which the vapour bubbles form with increase in heat flux, is called as
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MCQs: When the formation of bubbles becomes very high in pool boiling, then the heat flux
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MCQs: What is critical heat flux in boiling heat transfer process?
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MCQs: Consider the heat is transferred through a wall of surface area A and thickness t at the rate of q, what is the thermal resistance of the system? The thermal conductivity of the wall is k and the heat is transferred normal to the surface area A.
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MCQs: The potential difference in an electrical system, is analogously considered as
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MCQs: What is the correct formula for the rate of heat transfer (q) through a plane wall of thickness l and surface are A, when temperature difference between two surfaces is ΔT ? The thermal conductivity is k.
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MCQs: Thermal conductivity of the same material varies with
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