

MCQOPTIONS
Saved Bookmarks
1. |
A pipe of 25 mm outer diameter carries steam. The heat transfer coefficient between the cylinder and surroundings is 5 W/m2K . It is proposed to reduce the heat loss from the pipe by adding insulation having a thermal conductivity of 0.05 W/mK. Which one of the following statements is TRUE? |
A. | The outer radius of the pipe is equal to the critical radius |
B. | The outer radius of the pipe is less than the critical radius |
C. | Adding the insulation will reduce the heat loss |
D. | Adding the insulation will increase the heat loss |
Answer» D. Adding the insulation will increase the heat loss | |