Question 1084 Deck General

The correct answer is C) gastight bulkheads. Cargo pumps in tank vessels carrying grade D liquid cargo must be isolated from sources of vapor ignition by gastight bulkheads. This requirement is specified in the regulations for tank vessels, which mandate that cargo pump rooms and pump rooms containing cargo pumps for grade D liquid cargo be separated from potential ignition sources by gastight bulkheads. The other options are incorrect because general cargo spaces (A) and passageways or living quarters (B) do not provide the necessary isolation from vapor ignition sources, while cofferdams (D) are not the specific structural element required by the regulations.