Topic: Heat Transfer
A steam pipe is to be insulated by 2 insulating materials put over each other. For best results
- A. better insulation should be put over pipe and inferior one over it
- B. inferior insulation should be put over pipe and better one over it
- C. both may put in any order
- D. unpredictable
Answer: D. unpredictable
Explanation: In case of same thickness of insulation, for better insulation K1 < K2 (better insulation over pipe). However, since the thickness of insulation is not given in the question, the result is unpredictable.