A. 2 metres of water column
B. 3 metres of water column
C. 3.5 metres of water column
D. 4 m of water column
E. none of the above
Correct Answer: 3 metres of water column ✔
Last Updated: May 18, 2023
A. 2 metres of water column
B. 3 metres of water column
C. 3.5 metres of water column
D. 4 m of water column
E. none of the above
Correct Answer: 3 metres of water column ✔
Last Updated: May 18, 2023