Steam at 320 c flows in a cast iron pipe (k = 80 w/mk) whose inner and outer diameters are 5 cm and 5.5 cm respectively. the pipe is covered with 3 cm thick glass wool insulation with k = .05 w/m-k. heat is lost to the surrounding at 5 c by natural convection with heat transfer coefficient of 60 w/m^2-k. taking the heat transfer coefficient inside the pipe to be 18 w/m^2k, determine the rate of heat loss from the steam per unit length of the pipe. also determine the temperature drop across the pipe shell and the insulation.

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explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer:

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