Choose the right answer 1. The temperature profile for steady hest conduction through a plane wall of constant thermal conductivity is

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.23P: Using the information in Problem 1.22, estimate the ambient air temperature that could cause...
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GChoose the right answer
1. The temperature profile for steady hest conduction through a plane wall of constant
thermal conductivity is
a. logarithmic b. parabolic
2. A brick wall (k-0.75 W/mK ) transmits $02 of heat loss through another wall (k-0.25
W/mK, x-100 mm). If the temperature difference across both walls is the same, the
thickness of the brick wall would be
a.150 mm
c. linear
6T
b. 240 mm
c. 300 mm d. 375 mm
3. The maximum temperature at the center of the solid sphere of radius R having heat
generation q (W/m') is given by
g'R
+9R
b. T, +
4k
T+9R
6k
d. T+9R
8k
a.
2k
C.
4. The internal thermal resistance of a solid can be ignored if the Biot number is less than
a. 1
b. 0.5
c. 0.1
d. Fourier number
5. The ratio of heat transfer of a fin to the heat transfer without fin is referred to as
a. fin resistance
b. fin efficieney
efin effectiveness d. fin conductance.
Transcribed Image Text:GChoose the right answer 1. The temperature profile for steady hest conduction through a plane wall of constant thermal conductivity is a. logarithmic b. parabolic 2. A brick wall (k-0.75 W/mK ) transmits $02 of heat loss through another wall (k-0.25 W/mK, x-100 mm). If the temperature difference across both walls is the same, the thickness of the brick wall would be a.150 mm c. linear 6T b. 240 mm c. 300 mm d. 375 mm 3. The maximum temperature at the center of the solid sphere of radius R having heat generation q (W/m') is given by g'R +9R b. T, + 4k T+9R 6k d. T+9R 8k a. 2k C. 4. The internal thermal resistance of a solid can be ignored if the Biot number is less than a. 1 b. 0.5 c. 0.1 d. Fourier number 5. The ratio of heat transfer of a fin to the heat transfer without fin is referred to as a. fin resistance b. fin efficieney efin effectiveness d. fin conductance.
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