Q5: Choose the correct answer.1-Ingeneral, the thermal conductivity of a substance is,a- Independent of temperature.b- A strong function of pressurec- Strongly temperature dependentd- Independent of pressure.2-Heat transfer takes place according to:a- Fourier's law.b- Zeroth law of thermodynamics.c- First law of thermodynamics.d- Second law of thermodynamics3-The unit of overall heat transfer coefficient is.a- W/m.kb- W/m?.kc- W/m,d- W/m.k.4-The critical radius of insulation for sphere is equal to;a- 2kh.b- 2k/h.c- h/2k,2d- V2kh5-The temperature variation in lumped heat capacity analysis is.a- Linear with time.b- Quadratic with time.c- Cubic with time.d- Exponential with time.6-The character length in Biot number is the ratio of;a- Volume of solid to its surface area.b- Surface area to perimeter of the solid.c- Perimeter to surface area of the solid.d- Volume of surface of the solid.7-The radiation shape factor between two large parallel plates is;a- 0.0b- 0,5c- 1d- 28. Consider two infinitely long blackbody concentric cylinders with a diameterratio D D,=3. The shape for the outer cylinder with itself will be.a- 0.0b- 1/3c- 2/3.d- 1.0

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Q5: Choose the correct answer. 1-Ingeneral, the thermal conductivity of a substance is, a- Independent of temperature. b- A strong function of pressure c- Strongly temperature dependent d- Independent of pressure. 2-Heat transfer takes place according to: a- Fourier's law. b- Zeroth law of thermodynamics. c- First law of thermodynamies. d- Second law of thermodynamics 3-The unit of overall heat transfer coefficient is. a- W/m'k b- W/m².k c- W/m. d- W/m.k.

Q5: Choose the correct answer. 1-Ingeneral, the thermal conductivity of a substance is, a- Independent of temperature. b- A strong function of pressure c- Strongly temperature dependent d- Independent of pressure. 2-Heat transfer takes place according to: a- Fourier's law. b- Zeroth law of thermodynamics. c- First law of thermodynamies. d- Second law of thermodynamics 3-The unit of overall heat transfer coefficient is. a- W/m'k b- W/m².k c- W/m. d- W/m.k.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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