4- Hot water flows inside a 2.5 cm inside diameter tube, the tube has a wall thickness of 0.8 mm (tube length-1m) with a thermal conductivity of (20 W/m. "C) , the inside and outside convection resistance are (0.00662, 1.196 °C /W) respectively. the overall heat transfer coefficients depending on the outside diameter of the pipe is equal to: a) 9.94 W/m2 °C c) 0.5 W/m2 °C b) 200W/m2 °C d) None of them

4- Hot water flows inside a 2.5 cm inside diameter tube, the tube has a wall thickness of 0.8 mm (tube length-1m) with a thermal conductivity of (20 W/m. "C) , the inside and outside convection resistance are (0.00662, 1.196 °C /W) respectively. the overall heat transfer coefficients depending on the outside diameter of the pipe is equal to: a) 9.94 W/m2 °C c) 0.5 W/m2 °C b) 200W/m2 °C d) None of them

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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4-
Hot water flows inside a 2.5 cm inside diameter tube, the tube has a wall thickness of 0.8 mm (tube
length=1m) with a thermal conductivity of (20 W/m. "C) , the inside and outside convection
resistance are (0.00662, 1.196 °C /W) respectively, the overall heat transfer cocfficients depending on
the outside diameter of the pipe is equal to:
a) 9.94 W/m2 °C
c) 0.5 W/m C
b) 200W/m2 °C
d) None of them
5-
The thermal resistance circuit for one-dimensional heat flow through a multilayer cylinder is:
In /r)
In(rfr)
2xkL
Ar
b)
c)
d)none of them
Plane wall with heat generation, at x-0 (T-TI) insulated surface ,at x-L (T-T2) and (T1#T2), The
temperature distribution curve inside the wall is:
6-
(b)
(d)

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