阿摩線上測驗
21. What is the function of isolation valves on the fire main on main deck of tankers?
(A) To preserve the integrity of the fire main system in case of fire or explosion.
(B) To increase the water pressure of fire main.
(C) To decrease the water pressure of fire main.
(D) To prevent activating of relief valve on fire main.
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統計： A(406), B(83), C(47), D(62), E(0) #3209686
統計： A(406), B(83), C(47), D(62), E(0) #3209686
