Q. A pressure vessel is said to be a thick shell, when (Solved)
1. it is made of thick sheets
2. the internal pressure is very high
3. the ratio of wall thickness of the vessel to its diameter is less than 1 / 10
4. the ratio of wall thickness of the vessel to its diameter is greater than 1 / 10
- d. the ratio of wall thickness of the vessel to its diameter is greater than 1 / 10