Question

A boiler is made of a copper plate `2.4mm` thick with an inside coating of a `0.2mm` thick layer of tin The surface area exposed to gases at `700^(@)C` is `400cm^(2)` The maximum amount of steam that could be generated per hour at atmospheric pressure is
`({:(K_(cu)=0.9cal//cm-s-^(0)& k_("tin")=0.15cal//cm-s-^(0)C andL_(steam)=540cal//g:})` .
A. `5000Kg`
B. `1000Kg`
C. `4000Kg`
D. `200Kg`

Answer 1

Correct Answer - C
`((Q)/(t))=("temperature difference")/("thermal resitance")=(theta_(2)-theta_(1))/(R_(1)=R_(2))`
`m=(((Q)/(t))xx"giventime")/(L_(ice))` .