Question
Question: At some temperature T, a bronze pin is a little large to fit into a hole drilled in a steel block. T...
At some temperature T, a bronze pin is a little large to fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when
A
Only the block is heated
B
Both block and pin are heated together
C
Both block and pin are cooled together
D
Only the pin is cooled
Answer
Only the block is heated
Explanation
Solution
Since coefficient of expansion of steel is greater than that of bronze. Hence with small increase in it's temperature the hole expand sufficiently.