MCQs: Which of the following has maximum value of thermal conductivity________________?
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MCQs: Heat transfer by radiation mainly depends upon___________________?
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MCQs: Moisture would find its way into insulation by vapour pressure unless it is prevented by __________________ ?
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MCQs: Thermal diffusivity is ____________________?
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MCQs: Thermal conductivity of wood depends on_______________?
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MCQs: Film coefficient is defined as Inside diameter of tube________________?
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MCQs: Unit of thermal diffusivity is_________________?
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MCQs: In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by___________________?
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MCQs: The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as ________________?
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MCQs: A grey body is one whose absorptivity_________________?
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MCQs: Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called__________________?
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MCQs: Two balls of same material and finish have their diameters in the ratio of 2 : 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of____________________?
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MCQs: Emissivity of a white polished body in comparison to a black body is________________?
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MCQs: A non-dimensional number generally associated with natural convection heat transfer is________________?
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MCQs: In heat exchangers, degree of approach is defined as the difference between temperatures of________________?
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MCQs: A steam pipe is to be insulated by two insulating materials put over each other . For best results__________________?
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MCQs: According of Kirchhoff’s law______________________?
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MCQs: LMTD in case of counter flow heat exchanger as compared-to parallel flow heat exchanger is _________________?
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MCQs: Fourier’s law of heat conduction is valid for_________________?
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MCQs: In counter flow heat exchangers_________________?
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