(The overall heat transfer coefficient, The critical thickness of insulation and the steady of heat conduction) Q16) The thermal resistance of one layer plane wall is: A) AX/Ka B)ln(r/ro)/2kl C) (1/ri -- 1/r.) 14k D) 1 /hA The thermal resistance of one layer cylinder is: A) AXIKA B)In(ri /ro)/2kl C) (1/ri -- 1/ro) 14k D) 1 /hA The thermal resistance of one layer sphere is: A) B)In(ri /ro)/2kl C)(1/ri -- 1/ro) /4k AX/Ka D) 1 /hA The thermal resistance of heat transfer convection is: B)In(ri /ro)/2kl Q17) The unit of thermal conductivity (k) is: A) AX/Ka C) (1/ri -- 1/ro) /4k D) 1 /hA C) m?/sec A) w/m c The unit of thermal diffusivity () is: A) w/m c The unit of heat transfer coefficient by convection (h) is: A) w/m c B) w/m? k B) w/m2 k C) m2/sec B) w/m2 k C) m2/sec
(The overall heat transfer coefficient, The critical thickness of insulation and the steady of heat conduction) Q16) The thermal resistance of one layer plane wall is: A) AX/Ka B)ln(r/ro)/2kl C) (1/ri -- 1/r.) 14k D) 1 /hA The thermal resistance of one layer cylinder is: A) AXIKA B)In(ri /ro)/2kl C) (1/ri -- 1/ro) 14k D) 1 /hA The thermal resistance of one layer sphere is: A) B)In(ri /ro)/2kl C)(1/ri -- 1/ro) /4k AX/Ka D) 1 /hA The thermal resistance of heat transfer convection is: B)In(ri /ro)/2kl Q17) The unit of thermal conductivity (k) is: A) AX/Ka C) (1/ri -- 1/ro) /4k D) 1 /hA C) m?/sec A) w/m c The unit of thermal diffusivity () is: A) w/m c The unit of heat transfer coefficient by convection (h) is: A) w/m c B) w/m? k B) w/m2 k C) m2/sec B) w/m2 k C) m2/sec
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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i need the answer quickly
![(The overall heat transfer coefficient, The critical thickness of insulation and the
steady of heat conduction)
Q16) The thermal resistance of one layer plane wall is:
A) AX/Ka
B)ln(n/ro)/2kl
C) (1/ri -- 1/r.) /4k
D) 1 /hA
The thermal resistance of one layer cylinder is:
A)
AX/Ka
B)ln(ri /ro)/2kl
C) (1/ri - 1/ro) /4k
D) 1 /hA
The thermal resistance of one layer sphere is:
A)
AX/Ka
B)ln(ri /ro)/2kl
C) (1/ri -- 1/ro) /4k
D) 1 /hA
The thermal resistance of heat transfer convection is:
A)
AX/Ka
B)ln(ri /ro)/2kl
C) (1/ri -- 1/ro) 14k
D) 1 /hA
Q17) The unit of thermal conductivity (k) is:
C) m?/sec
A) w/m c
The unit of thermal diffusivity () is:
B) w/m? k
C) m2/sec
A)
The unit of heat transfer coefficient by convection (h) is:
A)
w/m c
B) w/m2 k
w/m c
B) w/m2 k
C) m2/sec
II](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0c50015a-fda0-48cc-abc0-3ae3dbfb17ea%2Fa411f239-dcc1-45a1-a272-b118583e3ff8%2Fp1cjds_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(The overall heat transfer coefficient, The critical thickness of insulation and the
steady of heat conduction)
Q16) The thermal resistance of one layer plane wall is:
A) AX/Ka
B)ln(n/ro)/2kl
C) (1/ri -- 1/r.) /4k
D) 1 /hA
The thermal resistance of one layer cylinder is:
A)
AX/Ka
B)ln(ri /ro)/2kl
C) (1/ri - 1/ro) /4k
D) 1 /hA
The thermal resistance of one layer sphere is:
A)
AX/Ka
B)ln(ri /ro)/2kl
C) (1/ri -- 1/ro) /4k
D) 1 /hA
The thermal resistance of heat transfer convection is:
A)
AX/Ka
B)ln(ri /ro)/2kl
C) (1/ri -- 1/ro) 14k
D) 1 /hA
Q17) The unit of thermal conductivity (k) is:
C) m?/sec
A) w/m c
The unit of thermal diffusivity () is:
B) w/m? k
C) m2/sec
A)
The unit of heat transfer coefficient by convection (h) is:
A)
w/m c
B) w/m2 k
w/m c
B) w/m2 k
C) m2/sec
II
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