 # E-PolyLearning

Welcome to the largest collection of MCQs on the Internet. Access and Discuss these Multiple choice questions for various competitive Exams and Interviews.
 1. In case of heat conduction through plane wall, which one of the following is not a correct assumption? a. Steady state b. Three dimensional heat flow c. Volumetric heat generation must be constant d. K must be constant
 View Answer Report Discuss 50-50! Answer: (b).Three dimensional heat flow

 2. If Q X is heat generated in at distance ‘x’, then heat conducted out at a distance (x + d x) will be a. Q X + 3d (Q X) d x /d x b. 2Q X + d (Q X) d x /d x c. d (Q X) d x /d x d. Q X + d (Q X) d x /d x
 View Answer Report Discuss 50-50! Answer: (d).Q X + d (Q X) d x /d x

 3. Notable example of uniform generation of heat within the conducting medium are (i) Energy of a nuclear reactor (ii) Liberation of energy due to some exothermic chemical reactions (iii) Resistance heating in electrical appliances Which of the statements made above are correct? a. 1, 2 and 3 b. 1 and 2 c. 1 and 3 d. Only 2
 View Answer Report Discuss 50-50! Answer: (a).1, 2 and 3

 4. For a plane wall of thickness l with uniformly distributed heat generation q g per unit volume, the temperature t₀ at mid plane is given by a. t₀ = q g l²/2k +t w b. t₀ = q g l²/4k +t w c. t₀ = q g l²/8k +t w d. t₀ = q g l²/16k +t w
 View Answer Report Discuss 50-50! Answer: (c).t₀ = q g l²/8k +t w

 5. The temperature drop in a plane wall with uniformly distributed heat generation can be decreased by reducing a. Wall thickness b. Heat generation rate c. Thermal conductivity d. Surface area
 View Answer Report Discuss 50-50! Answer: (a).Wall thickness

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