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To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than | |
A. | 2.4 m above the hydraulic gradient [Wrong Answer] |
B. | 6.4 m above the hydraulic gradient [Correct Answer] |
C. | 10.0 m above the hydraulic gradient [Wrong Answer] |
D. | 5.0 above the hydraulic gradient [Wrong Answer] |
E. | none of the above. [Wrong Answer] |